"Hello from Hawaii!

I would love to purchase a male hafnium wedding band like you have on your website. Let me know what you need from me and what options you have available!

Very best,

⚫︎⚫︎⚫︎⚫︎"

This is a hafnium wedding ring that I made in response to the inquiry above.

My English conversation skills are not that good, but if I use Google Translate for email correspondence, I don't have any trouble with difficult terms or detailed discussions when deciding on the specifications for the ring.

【Decision items】

1: Material

2: Ring width

3: Ring size

4: Design (=shape)

5: Finishing (= surface treatment)

6: Engraving of characters

7: Stone retainer

The specification decision items are the same, so there is no discrepancy.

[Process flow]

1: Determination of specifications

2: Confirmation of order (with payment)

3: Ordering hafnium materials

4: We will make an aluminum prototype (same shape and dimensions as the actual production) and deliver it via EMS.

5: Material arrival

6: Cut out

7: Carved out

8: Lettering

9: Polish

10: Completed, and delivered (about 4 months after order confirmation)

The process is the same.

As with domestic orders, after the specifications are decided, we will make an aluminum prototype and deliver it via EMS for you to check. Payment is also smooth using PayPal,

and the finished product will also be delivered via EMS.

It's very interesting to be able to receive orders from all over the world through email exchanges while staying in Tokyo!

To order rings→Click here

Metal allergy free rings→Click here

The couple were looking for metal allergy free rings and

found our website, then visited us.

Their choice was Hafnium rings.

The design they wanted was twist on the front, round cut

good fitting.

Hafnium is tough and smooth so you are always comfortable

with your ring.

You also don't need to worry for dirt, color change even in

hot springs, at bath, and chemicals and can wear the ring

always.

No maintenance is needed in daily use.

Hafnium is the best material for wedding rings 'cause it is

tough and beautiful!

Now only their rings are made.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple saw our website and wanted to order wedding rings.

They ordered Tantalum rings after discussion.

We spent six years for this best fitting form and we are

sure no others can make the same thing.

Also Tantalum is great for long time wearing that you will

feel like the ring is a part of your body.

At our Daikanyama studio, you will be so excited to make

your only one by rare material, also you can see how your ring

is made at each process.

Usually we need for four monthes to make your ring, at each process

we report you and you can check how it goes.

Cutting process, rough shaving, you receive photos and you can

enjoy the process of making.

Of course order made rings are more expensive than ready made,

but you feel joy to see the way one metal mass becomes beautiful

rings as you wanted.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple wanted to order metal allergy free wedding rings.

Then they visited us in June.

Then they decided to order Tantalum rings.

Tahtalum becomes deep deep sea clarity after polishing.

No other metals becomes like this.

We use No.2000 sand paper and polish; also make Tantalum

surface like mirror.

His design is round good fitting,

and her design is twisted & wave.

Their desins are different, but the material are the same

and in good match.

They got very beautiful and safe Tantalum wedding rings.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

She was looking for her husband's wedding ring and she

wanted to order semi-order Tantalum ring at size 13.

Tantalum is very popular material at our studio for 

megal allergy free, corrosion resistance and no elution to

aqua resia.

Also Tantalum is much harder and stronger than Gold and Platinum.

It also has stickiness on the other hand, we don't cut Tantalum

when size change is needed; we just do forging.

I always tell people that Tantalum is the very best material for

wedding rings people wear always and a long time.

Especially Tantalum black shining color is loved by men.

It has a special atmosphere and no bended even the ring is slim.

The material is the best one, design is simple and cool!

Tantalum semi-order wedding ring is done.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

They wanted to order wedding rings with simple but a bit 

accented design and with Hafnium.

For her ring, we made a soft waved line and his ring

is just straight with no wave.

They have similar parts and different parts but you can see

they are a pair.

Hafnium is a material with matal allergy free, and no color

changes and no dullness, then strong, so you wear ring stress

free.

Safety, maintenance free rings you want to have are only at

our studio.

The best rare metal wedding rings are now at their hands.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple wanted to order Tantalum or Hafnium wedding rings.

Usually for the appointment, we ask clients to call or e-mail us to

make sure the meeting time.

The reason why is our ring studio is not shop and clients cannot

visit shop so I always meet clients at a cafe near our studio.

This makes our running cost lower and can make great products at

reasonal price compare to the others.

In fact, the others cannot supply rare metals such as Hafnium

and you would know the fact.

After the meeting, they decided to order Hafnium that they

liked silver shiny beautiful color.

The design is simple round shaped and hair line finished for

his ring.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple is living in Hokkaido (Northern area) but knew about our

studio by website.

Her fiance has metal allergy so she wanted to order metal allergy

free wedding rings for him.

She also wanted to use a diamond stone that was given from her

grand mother.

She though she can always wear wedding ring so got this idea.

Her diamond was a big size so I recommended her to choose

Princess cut diamond and princess hug setting.

Special atmosphere of Tantalum hair line finish and

princess cut diamond are in great match.

Their only one pair ring was made like this beautiful.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple is going to have their wedding day in next Jan.

and were looking for metal allergy free rings.

One of them has allergy and used to get red spots on skin after

touching Silver jewelry.

Hafnium and Tantalum are very safe materials as I always tell.

Clients never got allergy with Hafnium and Tantalum.

The causation of metal allergy is melted metals (metal ions)

react protein of human body and immunity overreacts, but

Hafnium never melt so it cannot be a causation of allergy.

Then the couple ordered Hafnium wedding rings with

just fitting comfortable design.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple wanted to see ring material samples before order

because they usually do not wear jewelry and need to know things

including their finger sizes.

Their final choice was Tantalum for him and Pink Gold for her.

Although she wanted to bring in her stone but the stone was a big one

and didn't fit her ring design, so they decided their rings simple

and show the greatness of materials.

Pink Gold at our studio is 58:42 (Gold:Copper) mixed.

Pretty pink color is so vivid.

One of important points is no Silver mixed.

(The color goes whiter if you mix Silver.)

The black deep color of Tantalum and vivid Pink Gold are in

beautifully matched!

To order rings, for consultation→こちら

Metal allergy free rings→こちら

She has metal allergy and wanted to order wedding ring with safe

material.

She also wanted to do patch test with material before order 'cause

she worried her serious allergy on skin.

She made sure that she is ok with Hafnium after patch test

and we started about design, samples, checking; 9 months were

needed until the final rings.

Their wedding rings' design is wavelets on calm lake,

mirror finish Hafnium shows this design more beautiful.

The safe material with their special beautiful design,

They received great order made wedding rings.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The client wanted to order a diamond necklace for his wife 

and he wanted 'Genre Blue' 86 face-cut.

His choice for diamond was 86 face-cut Diana San Diamond

'Genre Blue'; 0.678ct, very light yellow color big diamond stone.

The frame is 18K yellow gold with gold chain also show diamond 

beautiful.

Diamond itself is already wonderful so simple frame and chain 

are good choice.

Because this Diamond necklace was so great, I made special wooden

box, too.

Our studio staffs also were so moved by this beautiful necklace.

His wife must be very happy with his present.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

Diana San Diamond→  (Click!) 

The couple wanted to order metal allergy free wedding rings

and ordered Hafnium rings after discussion with us.

The design of their rings is mobius strip.

Outside of strip goes inside and back to outside again, as you know.

The soft line disign fits finger that is so popular at our stuido.

This mobius strip design was made 6 years ago at our studio.

Other shop copied our design, but we are the original and clients

often say our mobius strip design is the most beautiful and it is

my joy.

The best material, Hafnium is beautiful, comfortable, strong and

metal allergy free, so they can wear their Hafnium rings always

without any worries.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

They were looking for metal allergy free rings and found our website,

then visited us.

For her, they choosed Hafnium; metal allergy free ring with

mirror finish and set stone.

And he choosed rare Orange Gold ring with hammer eyes finish

with sand blasted finish.

They look different but the message inside rings are the same;

you can make your own design as you want by order made.

For discussion with clients, I ask their idea, thoughts, and

give them advice about rings' materials and designs.

Then I make rings so I do not make mistakes with their thoughts.

Now they got their only one pair ring!

To order rings, for consultation→こちら

Metal allergy free rings→こちら

At first time, he asked me if he can order only one ring

because he doesn't have allegy but his wife has.

Of course we can make one ring.

He designed 2mm slim, good fitting simple roundly shaped

ring for his wife and put his message inside of ring.

Wearing with eternity ring is also great.

His choice for the material was Hafnium.

It was unforgetable scene when he gave her this great present.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple wanted to order metal allergy free wedding rings

and visited us.

Their skin is so sensitive that easily get red spots when they

wear jewelry, so they choosed Tantalum as their ring material.

The design is simple, roundly shaved good fitting.

Mirror polish made rings get no dirt.

Very small messages are inside of rings and they don't need to

worry for allergy with their rings.

They now get no stress and feel safe with Tantalum.

I would say, Tantalum is the most gentle material and only one.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

His fiancee has metal allergy and jewelry shop clerk adviced her

not to wear wedding ring, but he searched safe rings and found

our website.

They are living far from Tokyo and wanted to order rings and

decide design, material by phone talking and mails.

We talked about their rings and they decided to order

Hafnium rings.

Most of wedding rings are made from Platinum or Gold, but

people with allergy get trouble even by Platinum and Gold.

At Daikanyama studio, we studied about safe metals and

started making Hafnium rings from 6 years ago.

Since then, many couples who have metal allergy ordered safe

wedding rings at our studio and it is our pleasure.

Actually Hafnium is expensive and difficult to buy; we need to

order rare matals from oversea, and difficult to make shapes

because of high melting point (2231'C), that's why no other jewelry

studio can make these rare rings as we do.

The best material and simple design shows their wedding rings

so beautiful.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

He was looking for metal allergy free wedding rings for his

fiancee and found us.

They decided to order Hafnium rings after discussion.

The couple are living in Miyazaki Pref. and couldn't

visit us in Tokyo, but we talked about design and other details

and made sample rings first.

We are only one ring studio in the world that can make

Hafnium rings in the way you want.

By e-mails, phone meetings, we make sure everything with you

and make your ideal rings.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple was looking for allergy free rings and visited us

one day on Jan.

Their choice was Hafnium.

Hafnium is so popular among people looking for allergy free.

The design of their Hafnium rings is round shape which is

also so popular.

This design is just so simple at the first glance, the round

shape of inside makes good fitting and it is connected to

outside of ring with gentle curve.

Mirror polish shows shining lights beautifully and you will

see the beauty and simplicity on their rings.

Their choice was so cool and received elegant, beautiful, safe

rings.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The client wanted to order their wedding rings with rare 

metal.

They arrived us one day on Feb and discussed about the

material, design, and checked sizes.

They touched and checked many materials and

they liked Tantalum that has deep black color and shining

clarity.

Of course Tantalum is 100% metal allergy free material.

Their rings' design was totally made by them;

numbers of lines, starting point and slope, and

we made them as they ordered.

They enjoy wearing, enjoy looking at, they received their

happiness with rings.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

He was looking for their wedding rings and his fiancee

was also interested in rare metals after they checked

our website.

Then they visited us in March this year and

ordered Tantalum rings.

They ordered mobius strip design; we cut at every 0.25 sizes

and made just fitting rings for them.

Tantalum is used at cutting-edge field rare metal.

The corrosion resistance is very high.

Tantalum is always safe even in hot spring, sea water and daily

used chemicals.

Even aqua resia; melts Gold and Platinum, cannot melt 

Tantalum so you can wear Tantalum ring everywhere everytime without

worry.

Safe and beautiful Tantalum mobius strip design rings were

made here.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

He wanted to order Tantalum wedding rings with round shaped

design.

Although they were too busy to visit us, we have sent mails

and discussed about the design.

They also tried sample rings.

The design of rings are good fitting simple

round shaved one.

Daikanyama studio is NO. 1 to make Tantalum rings.

Here, they received Daikanyama studio's order made 

Tantalum rings.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple wanted to order rare metal wedding rings and were

thinking about Tantalum or Hafnium.

Then their final choice was Tantalum.

The design is mobius strips; twisted part is not too thin

and made shape round for good fittings.

The arranges is possible and you can make any designs you want

in order made.

Pure Tantalum is so hard, strong, no metal allergy.

The best material became their best wedding rings.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple were looking for metal allergy free rings and

found our website.

They visited us during their trip to Tokyo.

They also wanted to see and check Tantalum and Hafnium.

The ring design they wanted was simple and no stones.

They checked both and decided to order Tantalum rings.

The design is simple but good fitting and you can love this

for a long long time.

Hair line finish for him, mirror polishing finish for her;

both are beautirul and in great contrasts.

Tantalum is very strong, corrosion resistance. Safe and

great material. They got so beautiful wedding rings.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

He was looking for metal allergy free wedding ring for his

fiancee who has metal allergy; she used to get allergy when she was

playing guiter and her doctor said the causation was guiter strings.

He wanted to know the best material and fitting for her and

visited us.

His choice was Platinum 900, Iridium 100.

Usual Platinum jewelries are mixed with Palladium for making the

jewelries hard, but this Palladium may become the causation of

metal allergy.

At our Daikanyama studio, we don't use Palladium.

We used Iridium instead and made very safe rings.

Iridium is an expensive metal and we need to make each one by hand

but the material and safety are so wonderful.

Soft shaped line made beautiful light contrasts.

Their wedding ring is so beautiful.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple don't have metal allergy, but they were interested in

rare metal wedding rings.

They already decided the design.

Though they are living in Kumamoto Pref., but we send design and 

photos each other by mails and made their beautiful rings.

The ring design is; inside is Tantalum and outside is Zirconium,

round form. Sculpture design is dolphin, crystal of snow, bird, and

arabesque with colors.

We started making Zirconium base Tantalum wedding rings for them.

We made sculptures on Zirconium, and added colors; blue, light blue,

yellow, orange, pink, purple, vivid blue, green... used all colors

made by Zirconium anodization.

This was a big challenge but we really enjoyed this makings.

Brightning vivid colors of rings are so beautiful.

They got only their designed wedding rings that are only theirs!

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple live near from our studio.

He was interested in Hafnium for allergy and curiosity.

They wanted the rings' design mobius strip.

For his ring we made the ring width wider and showing volume.

We cut pure Hafnium mass and make rings, so of course no metal

allergy occur.

In Titanium group, Hafnium is more beautiful than Titanium

and Zirconium. Also it doesn't make color change and you

can enjoy forever beautiful shine of Hafnium.

The couple got maintenance free, safe and beautiful Hafnium

wedding rings.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple wanted to order their wedding rings with

eternal classic design.

They visited us at the end of the last year and

ordered Tantalum rings.

This time, I imagened how the rings look like with

image of eternal classic.

Beloved rings over long time, the needed things are

・Good fitting as you forget you are wearing ring.

・Timeless perfect proportion.

・Etarnally shinning diamond and strong hold by metal.

・The beautiful material and you just feel memories even it got

scratches.

・Perfect safe material for metal allergy.

I thought like this.

At Daikanyama studio, we make great rings with our clients 

that remain even 1000 years later, too.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple was looking for their wedding rings with no metal allergy

materials.

Two opinions didn't match although they saw many ring shops and studios,

but found Tokyo Diamond website and they both loved Hafnium ring with

royal blue color.

Hafnium makes clarified film under anodization and it becomes

beautiful color.

For royal blue color, we control the film around just 40nm then make

450nm royal blue lighting.

Hafnium anodized film is hard and stay long with the beautiful color.

This time, their design has lines and we made royal blue color in lines

so color remain for a long time.

Diamond on her ring is also beautiful with royal blue lines on

Hafnium.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple were looking for metal allergy free Tantalum wedding rings

and called us.

At the medical firlds, Tantalum is used for catheter and has high bio-

compatibility.

No elution, no rusting, black clarity shining Tantalum is very

attractive material for jewelry, too.

The couple wanted their ring design wave connected on two.

Look how beautiful the pair ring is!

To order rings, for consultation→こちら

Metal allergy free rings→こちら

They wanted to order their wedding rings and visited us on one day

on Sep.

Their ring design is, twisted in front.

Shaped image for him, soft wave image for her.

Unique part of their rings are hammer eyes finish that

makes sparkling shining occur on rings and reflect to mirror polished

parts which make beautiful contrasts.

Tantalum is strong and hard enough and their unique beautiful design

really matches with this great material.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple wanted to order Tantalum wedding rings after they

checked semi-order Tantalum rings on our website.

Then they ordered Tantalum semi-order rings on July.

Semi-order ring is width 2.0mm and only one design we prepare,

no trial sample rings, no ring box, so you only can choose the metal

material and sizes.

We offer this as special price.

Tantalum itself has special atmosphere so you will feel

semi-order is also good enough.

No bending and rusting occur on Tantalum rings even the design is

slim.

Of course Tantalum is metal allergy free.

They got simple, beautiful Tantalum wedding rings!

To order rings, for consultation→こちら

Metal allergy free rings→こちら

They made an appointment with us on mid June and

checked several materials such as Tantalum and Hafnium.

They had chosen Hafnium as their wedding rings.

Tantalum and Hafnium are the double top popular metals as

I always tell.

Hafnium has beautiful white silver shine, no color changes,

no metal allergy and no elution, so you can keep Hafnium rings

beautiful with no maintenance.

At the strength, Hafnium's vickers hardness is around HV200;

ex; Platinum is HV30, Pt900 is HV60, Hafnium is much harder than Pt 

so scratch resistant and no deformation occurs.

On the other hand, Only Areva company in France can purify Hafnium so

that not many can buy.

Also the process is difficult so only our Daikanyama studio can make

rings from Hafnium that is only one studio in the world.

This time, the design was good fitting smooth curved one.

They got their only one Hafnium order made wedding rings!

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple wanted to order metal allergy free wedding rings

and called us one day.

Their wedding rings are Tantalum.

Wave design on rings and the waves are connected by two

rings. The pair ring is like one ring.

For making contrasts on waves, we did sand blasted matte finish for

shady lines, polished like mirror for waves top.

Although they needed to wait for four months to receive their rings

after order, safe and happy atmosphere wedding rings were made!

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The client wanted to know the price for Tantalum pair ring first.

As I always say, Tantalum and Hafnium are rare and expensive.

And the price is changing every time.

After we talked about approximate prices, he decided to order

Hafnium wedding rings.

The width of their rings are 2.5mm.

We cut two rings from one Hafnium mass.

Hafnium is very rare metal, difficult to separate from Zirconium that

are found with.

The cost to make pure Hafnium is also high, so it is hard to get.

At Daikanyama studio, we buy Hafnium from trading companies but

Hafnium cost is so high.

Then we started to make two rings from one mass.

It was the first Hafnium rings in the world made by us.

Their rings have pair design of waves.

Their special wedding rings were made.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple came to us and decided to order

Iridium wedding rings.

Iridium is in the group with Platinum, but Iridium is

much more rare and expensive than Platinum.

It is hard, strong and has high corrosion resistance so

remains even after 1000 years.

Platinum is softer and bended and shaved so it cannot stay like

Iridium.

I say, Iridium is the form of love remains even after 1000 years.

Iridium is so perfect but it is really difficult material for us.

First of all, Iridium is so hard so need to use diamond shaving tools.

For polishes, we use No.240, 400, 800, 1500, 3000,5000.

We restart from the first step if we find even very small scratches on rings.

Beautiful curved shapes and shining mirror finish,

Wonderful Iridium wedding rings were made for them.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The client wanted their wedding rings’ design Reuleaux triangle by Tantalum.

The base of design of their rings are Realeaux triangle.

We checked details for good fitting and made this beautiful curved surface.

Before the final making, we made trial sample rings twice and checked with

clients.

Their rings are incredibly beautiful 

but all works are by our hands. Shaping works, too.

It was only way for Tantalum to be like these designed rings.

We enjoy this challenges, too.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple wanted to order uncompromising wedding rings

and found Daikanyama studio.

Then they made plan to visit us from Aichi Pref. in March.

They decided to order Tantalum rings.

At Daikanyama studio, we have Tantalum, Niobium, Hafnium, Zirconium,

Titanium, Iridium, Ruthenium as metal allergy free materials, also

Vanadium, Rhodium, Rhenium, other metals, we have maximum kinds of

metals and materials for rare rings order made.

Tantalum is metal allergy free, strong and heavy metal.

The color is black shine and so cool.

His ring is sand blasted finish and hers is mirror finish;

they show different attractive shapes.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple wanted to order Hafnium wedding rings.

Then they visit us on one day on March evening.

They decided design as curved good fitting ring with

one center line and made line royal blue.

This design is so good in contrast of colors.

Her ring is with beautiful diamond on royal blue center line.

So pretty in pair!

This royal blue color is made by anodized film control, so

this color goes away after several years.

On this design, the color is in line so it stays longer than

usual.

I always feel happy to talk with our clients and make special

designs.

I enjoy discussion and meetings with clients.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The client knew that Tantalum is very hard metal and difficult to

make sculpture on it.

We made this very rare ring although actually it is difficult.

The great thing with this ring is the sculpture stay longer than

usual material rings and can enjoy for a long long time.

This ring is collaboration model with a Hawaiian jewelry shop;

Pua Ally.

Collaboration of rare material and beautiful sculptures;

Very rare Tantalum Hawaiian ring was made for the client.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

They wanted to order metal allergy free wedding rings such as Tantalum.

Then they visited us on May during Golden holiday week and

decided to order Tantalum and Hafnium wedding rings.

Both are good fitting curves with hammer eye finished.

His ring is Tantalum; sand blasted on hammer eye with matte finish.

Her ring is Hafnium; hammer eye with mirror finish.

This pair is made from different material but they have

a good contrast each other.

Tantalum matte hammer finish, Hafnium smooth hammer finish are

new feeling that only they can feel and touch.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple wanted to make the same design rings that they

saw on website.

They also decided the material Tantalum.

They live in Miyazaki Pref. and couldn't visit us in Tokyo

for the distance so we made sample rings first and

they checked fitting and sizes by sending.

We make the sculpture by free hand shavings, Tantalum is so hard

and it takes time, skill, and cares.

We have special tools and knowledges so can make it!

The effort is needed but the all finished Tantalum rings with

sculptures are so beautiful and strong that you don't need to

worry for metal allergy and the strength.

Tantalum really matches for everyday use wedding rings.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The client wanted to buy metal allergy free wedding ring and found

our website and came to meet me.

His wife has metal allergy so they ordered only her wedding ring

with Hafnium.

She hoped very good fitting and wanted to wear always so we

made width 2.00mm slim ring.

Shaved the ring with round shape and polished as mirror.

Her ring also has carved seal inside though the ring is so slim.

With slim ring, the fitting is good and you can wear some other

rings together but it is bended by daily use often.

You don't need to worry with Hafnium; it is so strong and unbending.

Comfortable fitting and strong order made Hafnium ring was made.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

He wanted to remake Platinum wedding ring of his wife for 10th

wedding anniversary.

His wife has metal allergy these two years and couldn't wear it anymore.

He also wanted to know about metal allergy free materials for

her new ring.

He also wanted to change his ring material as same as hers.

His choice was Hafnium; the reason of this choice was,

Hafnium is very safe material for metal allergy people.

He wanted to keep the rings' design the same as before and

just wanted to change material to Hafnium.

He could give his wife the best value ring at the anniversary

and no need to worry for her allergy.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

They wanted to order their wedding rings and

their rings are outside Tantalum inside Zirconium.

We made vivid colors on Zirconium by anodized film that

makes beautiful contrast with black Tantalum color.

We set Tantalum and Zirconium by cutting and set with caulking machine

because they cannot be connected by blazing or metal binding.

By the way, Tantalum can be colored by anodized film but it doesn't

stay long so we polish Tantalum and make black shiny beautiful color

for it.

This design shows both Tantalum and Zirconium the most beautiful.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

My sister introduced me your ring studio.

I want to order my wedding rings.

She said and we met on one day in March.

Their choice was Tantalum for him and Hafnium for her.

Her sister used to order Hafnium wedding ring several years ago

and she is comfortable with her ring without allergy anymore, so

she wanted to have one for her, too. (She also has metal allergy.)

Tantalum ring is square in shape, Hafnium ring is round shape.

Wave design and finish are the same and only materials are different.

Both Tantalum and Hafnium are hard enough and not get scratches, but

they designed hair-line finish that keeps rings beautiful for long time use.

They received only their happy order made wedding rings.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

They said that they found Daikanyama studio website when

they were looking for a ring studio to order their wedding rings.

They checked many kinds of ring samples such as Tantalum, Hafnium,

Zirconium, Titanium, Niobium, Vanadium, Iridium, Gold and Platinum.

Their final choice was Tantalum.

At Daikanyama studio, for our special processing technology confidentiality

you cannot see inside of studio, so we have meetings at a cafe near Daikanyama

station.

Of course we show you many materials and sample rings so you can touch and

check details by yourself.

Only our studio can hold these many rare metals and you cannot touch these

even if you find them at museums, so many guests say watching and touching

these rare metals are a great experience.

That's why please make an appointment when you think to order rings

at our studio.

We hope you enjoy a small metal element theme park with us.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

They made an appointment with us for ordering their wedding rings.

Then they decided to order Hafnium rings.

Hafnium belongs to Titanium group (IV group), Titanium, Zirconium, Hafnium

are very heavy metals on element form.

For example, it is beside Copper, Silver and Gold in Copper group (XI group),

Nickel, Palladium and Platinum in Nickel group (X group) ; this means, the 

relationship between Titanium and Hafnium is just like Copper to Gold, or Nickel

to Platinum.

If you have knowledge in chemistry you can imagine how Hafnium is rare and 

special material even you had never seen Hafnium.

Hafnium never rust, has stickiness and hardness and I always think

how wonderful metal it is.

For long time wearing, maintenance free, no color change Hafnium has

great in cost performance for wedding rings and cannot compare to 

usual materials such as Platinum and Gold.

It is much more than that.

The couple received simple, good fitting round shape wedding rings.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple was looking for their only special rings for wedding and

found Daikanyama ring sturio website.

Then they visited us in Apr though they are living in Osaka.

Their choice was Tantalum rings.

As I always say, Tantalum is very special material; different from

other any such as Gold and Platinum.

It has original color, clarity shine in black and so rare.

It also matches with diamond stone.

Their rings' design is simple but this full width setting of diamond shows

beautiful shine and fitting is so good; this is our special skill developed

at our studio.

Of course, Tantalum is very strong to hold stone and good for daily use.

Unique, attractive and beautiful wedding rings are shining on their fingers now!

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple wanted to order wedding rings, and visited us

on one Feb weekend.

They wanted Hafnium, princess hug setting with small blue diamond

rings. The beautiful material, Hafnium matches with beautiful

diamond stones.

Forever shining diamonds with smooth fitting ring shape is the best

for daily wearing as wedding rings.

Their wedding rings are metal allergy free and beautiful in special

design.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple were looking for a ring studio that can make Hafnium

rings and found our website.

Their ring design is mobius strip with sand blast finish which

makes ring very elegant.

For this design, we need to make it looks twisted.

We need to cut Hafnium mass and shave as this design because

Hafnium is not able to be melted and welt.

The skills are needed to make this but we also enjoy this

difficulty and challenge.

You will know this mobius design ring fits your finger though

the shape is mobius.

Hafnium is of course safe for metal allergy.

Here, their dreamed rings were made.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The clients wanted to order Tantalum or Hafnium wedding rings.

Then they ordered Tantalum rings after visiting me.

We usually make trial sample rings by Aluminum and clients try them

and check design and fitting.

This makes clients and us to know the exact sizes and fittings,

also clients' feelings.

This time also, we checked sample rings and made Tantalum rings

with just great fitting and design for them.

We are the specialists for Tantalum and rare metals, so

you can order order made rings at our studio.

Only one ring for you in the world can be made by us.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple wanted Tantalum wedding rings for them.

They started thinking about the materials and design 1 year

before ordering.

We discussed so many times by mails and face to face and

tried many samples; I think they are the clients who really

needed long time.

Their final design was good fitting, simple flat base, put

geometric design that they designed and sand blast finished.

This kind of design really matches on Tantalum because Tantalum never rust

and also hard.

I thought these rings were really made for this couple!

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The clients wanted to order Zirconium rings for their wedding.

Zirconium can change its' colors by oxidation treatment control.

These colors are not paint, so you will see different colors from the

other sites like rainbow colors; the system is just like butterflys' wings.

Of course, Zirconium is metal allergy free.

The color came from natural and no toxic.

Their wedding rings are safe, comfortable and beautiful.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple wanted to order metal allergy free wedding rings.

Then their choice was Tantalum which is very safe material

for people who have metal allergy.

She designed her ring a image of ribbon,

and he designed his ring round and good fitting.

The polished tantalum rings are shining and so beautiful.

Tantalum is never melted to alkali and strong acid, is used

as material for artificial bones, heart parts.

This means Tantalum is very safe material even in human body.

At Daikanyama studio, we can make your design as you want.

We are proud of our skills, knowledge, and make you happy with

special rings.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple was planning to have a wedding party in July and

found our website when they were searching ordering their

wedding rings.

They came to meet me in Feb and decided to order Hafnium rings.

The design is very simple round shape, we made royal blue coloring

inside of rings by Anodic oxdation treatment.

The deep blue color matches Hafnium itself.

The royal blue coloring is not paint, it is a coloring by treatment,

so the color will be naturally gone after several years.

Then the rings will be basic Hafnium color.

You can enjoy this color changes, too.

The beautiful and safe wedding rings made with Hafnium are

very special for this couple.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

He was checking our website and sent us an e-mail.

His question was that if we can make a ring from

one of car parts.

His story was just like the following;

I got a trafic accident at Joban road at the end of last year.

My car was strongly crushed with high speed.

Fortunately I didn't make others in this crush; it was only on my own.

Anyway, the accident was a kind of serious one, but I just got slightly

cut at my right marriage finger that was healed by a band-aid.

The accident changed my sense of values.

I was so shocked and it was like I had a nightmare, then

now one week have past.

Now I am getting back to ordinary days

and forgetting the car accident although my friends and

family are saying it was a miracle thing that I didn't get

serious injuries.

My finger's cut mark will be gone soon.

I was afraid of missing my memories of the car accident.

Then I thought that I want to wear my crushed car part as my

ring and never forget it.

To make myself understand the car accident was terrible enough to

make me die, I came out to this idea.

I need to receive my crashed car parts before tomorrow 'cause

my car will be scrapped.

I want to ask you to make my special ring.

I feel close to you that we graduated from the same university.

Then he brought flange parts to me and we started making design.

I made his flange ring slim and smooth then he can wear whole life.

I can make difficult orders like this and love challenging work.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple is living in Ishikawa pref. but wanted to have a meeting

with us in Tokyo.

Both of them has metal allergy and have never tried rings, so they didn't

know their finger sizes.

Then they came to Tokyo on mid Feb.

We discussed about the materials and decided to make Tantalum rings.

Checked their finger sizes and their design idea was simple, good

fitting, roundly shaved.

For their first rings, we made simple but very good fitting and

safe one!

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The client had checked our website and ordered Tantalum wedding rings.

The design is roundly cut for good fitting, polished and hammer eyes 

finished.

The mirror reflects lights and sunshine and it's like spreaded dazzling shine.

This design matches Tantalum color and material then looks very special.

Of course the material is pure Tantalum, so you don't need to worry for

metal allergy.

Safe and beautiful their only one in the world is this order made

pair ring.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

His wife had metal allergy and he was searching safe ring materials

and found us and wrote to us.

He came from Kyoto (western Japan) and checked materials and

samples with us, then ordered Tantalum mobius strip design rings.

This mobius design is our studio's original.

On 2010, one client came to us and said

"I cannot find my favorite ring design anywhere".

Then we developped the mobius strip design for the client.

After that, this design is very popular and the beautiful ring shape

fits comfortablly on your finger.

Since, other shops and studios started copy the mobius strip designed

rings but our Daikanyama studio is the basic that our clients say.

We do create the rings by hands, not only drawing the designs, so

that makes the differences from the others.

Metal allergy free material; beautiful wedding Tantalum rings

with our original mobius strip design were made here.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

They wanted to order Tantalum wedding rings by knowing our studio

by web search.

Tantalum is atomic number 73, the same group of Vanadium.

Also Tantalum is very hard; vickers hardness is HV150 and very hard

compare to HV25 pure Gold and HV30 pure Silver.

Tantalum is the most black metal in whole metal groups, melting point is

2996'c and very high.

Tantalum has special atmospheres.

Polished mirror finish Tantalum is so beautiful and

Tantalum order made wedding rings are our confidence!

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The client has light metal allergy so he required the followings;

Material; Hafnium

Design; Simple wedding rings

Size; Want to check at the studio

No stone

We shaved Hafnium to flat shape and mirror finished.

Hafnium forms very strong passivation film, so most acid and

alkali are not eluted that mean metal ion isn't eluted, too.

Then there are no causations for metal allergy.

Hafnium powder may be eluted to strong alkari, but hard ring isn't

eluted even in strong alkali.

The beautiful pair ring made from pure Hafnium mass are their

special wedding rings.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The client had checked our website and was interested in

Hafnium ring.

Then he visited us on Sep 17th and ordered Hafnium wedding

rings after checking the sample and materials.

Their rings were cut from one Hafnium mass and

they became a beautiful pair ring.

The design is beautiful twisted line with mirror finish.

The other side is hair line finished.

These different finishes make the ring shape more beautiful.

Of course, pure Hafnium is very safe for metal allergy.

Safe and beautiful rings were made.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The client already decided his order;

Tantalum as material,

Princess hug-setting design.

Original messages and dates inside rings.

They wanted to use whole width princess cut diamond on

the ring which is our studio's development of original setting,

it's design is simple but shows diamond more beautifully.

Tantalum and Hafnium have hardness and stickiness, so

Diamond stone is strongly hold with this original setting and

has high durability.

Here, only one pair ring in the world was made for this couple.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The client said that his wife has got metal allrgy recently

and cannot wear wedding ring even Gold and Aluminum.

He wanted to order her ring at size 7 with Tantalum.

This Tantalum ring is very safe and with no trouble even

she has Gold and Platinum allergy.

At Daikanyama studio, we make semi-order simple rings with

reasonable price but the materials are the best as Tantalum and

Hafnium.

The ring's width is 2mm, thickness is 2mm. So the shape is

true circular.

Shaved and polished mirror finish design is kept clean cause

this simple design does not get dirts.

For this semi-order ring, you just need to tell us your

finger size and we can start making it.

The minimum design makes very simple and beautiful marriage ring

for people who has metal allergy.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

One day of March 2017, the couple visited us for ordering

their marriage rings.

Their choice was Iridium that is really rare much more than

Platinum, and Iridium is called King of precious metal.

Iridium is

much harder than Platinum; Platinum HV is around 30 and Iridium

HV is around 450,

heavier than Platinum; Platinum is 21.5 and Iridium is 22.5,

No ellution; risk is lower than Platinum which means you have

very low risk for metal allergy,

Whiter than Platinum so you cannot see yellowish color that

Platinum has.

Iridium is just shining in white.

Iridium itself is so special so the couple made

simple good fitting rings for their only one pair

ring in the world.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

I and my wife discussed about our marriage rings and decided to

make order at your Daikanyama studio.

Please take time for us and talk about design and material, the

client said.

The couple visited us and they decided to order Hafnium ring for him and

Pink gold ring for her.

Their design is the same though the materials are different.

Outside of rings are roundly shaved and you also can see square parts

that make the fitting so smooth.

The material colors are different and their contrast is beautiful!

Pink Gold is made with 14K at our studio; 58w% Gold, 41w% Copper, add

small amount of Palladium that make vivid pink color.

You cannot find the same rings at the other shops and studios;

This is only one pair of ring in the world.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple wanted to order metal allergy free, maintenance free

marriage rings.

Also they wanted to make cost lower as possible.

At the first meeting, we discussed about semi-order made but

2.5mm width was too thin they said and made the width to 2.5mm 

order made with simple design.

Tantalum is not eluted to acid and alkali so of course it

doesn't matter with sweat that means person with eczema and

atopic gets no trouble with Tantalum.

You will know the good fitting of Tantalum when you get one

Tantalum ring.

Tantalum ring is very safe, strong and also so beautiful.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple wanted to order their marriage rings and wanted to

make rings very special for them.

They wanted to wear specific type of design that no other people

are wearing.

They made their own designs such as wave sclupture shape with

full width.

Their marriage rings have pretty Aquamarine and Diamond on them and

the design is so special.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple found our website and visited us to order

their marriage rings.

Their choice was Hafnium.

We had two rings cut from Hafnium mass and made the strength

by forging process, then changed the sizes, shaved to round and

good fitting forms.

After this forging process, Hafnium is much stronger than before

so the ring shape is forever beautiful round.

Forging process is used for Platinum and Gold, but the Vickers'

hardness is HV100 to 130. Hafnium Vickers' hardness after forging

is more than HV200, so you will see the differences.

Only we, Daikanyama studio can make pure Hafnium with forging process

and ultimate fittings.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The client was looking for Tantalum or Hafnium marriage rings

for his girlfriend.

He wanted to know price, making process and term, so we started

discussing about them.

Finally he ordered Tantalum rings.

The different point of Tantalum is that we cannot melt it and

connect just like we do for Gold and Platinum.

We just need to cut from Tantalum mass and shave the designs.

Strength of Tantalum is 3 times of other metals and it is so hard

to cut and shave.

On the other hand, Tantalum ring isn't bend or broken after

finish.

This time, we designed slanting sculpture on the rings.

It is simple but not only that. You can see the pair ring matching

with a bit differences.

Metal allergy free Tantalum pair ring is made for them.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple wanted to order their marriage rings with

metal allergy free material.

However, they didn't know their finger sizes, had no idea for the

designs and material.

So we recommended them to visit us.

After discussion, they ordered Hafnium rings with softly curved

design. Her ring has a beautiful diamond setting on top.

Tantalum, Hafnium, Zirconium and Niobium are safe materials for

metal allergy as we always say.

Hafnium is especially light in color and strong.

Diamond and Hafnium shine each other beautifully.

Only one pair ring in the world.

You can choose from materials and make in your order.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The clients were living in Yamagata pref. and had no plan to

visit us in Tokyo.

So we talked on the phone and sent e-mails for discussion.

Their choice was Tantalum rings.

Of course we made trial sample rings and made sure their fittings

even they are away.

We did both sand blasted matte and mirror finish.

After that we did sand blast from one side again and made

natural gradation matte finish.

It made very special features on their rings.

Although we couldn't meet, the clients received

what they wanted.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The client had metal allergy and was looking for ring studio

that can make simple Tantalum rings.

We discussed for the designs.

For him, we made sharp center lined square design, and

for her, rekuef sculpture in front design.

Those two designs are different, but Tantalum specific material

make them similar and match, their pair ring is so beautiful.

Of course they don't need to worry for metal allergy with

Tantalum and can wear for whole life time.

Only one pair Tantalum marriage ring is shining on their fingers.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

The couple made an appointment with us on Dec 17th at 19:30.

They were interested in Hafnium and wanted simple design, diamond

set only on her ring.

We made the design simple and shaved round.

His ring is softly waved with only 0.5mm difference in height.

Her ring has waves at the side top and 1.0mm difference in height.

And pretty diamond is set on hi-light part.

The best materials, sophisticated design with shining beautiful

diamond stone became their special marriage rings.

To order rings, for consultation→こちら

Metal allergy free rings→こちら

They wanted to order their marriage rings.

After discussion, they ordered Hafnium twilled hair line pair ring

that design will not show scratches.

Vickers hardness of Hafnium is around HV200 and much harder than 

Platinum (HV60), so Hafnium ring can keep its' shape and no bended

but small scratches will be shown after several years of wearings.

For example, 

pottery's HV is around 1000, Glass HV is 400, Iron is HV300-600,

sands and rocks are HV1000 that means you touch harder (than 

Hafnium) materials daily and your ring gets small scratches

little by little.

This time, we used twilled hair line finish as ring design.

We use diamond tools and make thin lines on rings that make

scratches inconspicuous.

Also this hand craft makes warm and natural touches on rings.

Fitting is so soft, no metal allergy, Hafnium rings were made for them.