Tantalum offers the possibility to create black or dark grey jewelry and wedding rings without plating.

This metal is really very little known, but deserves all our attention; I particularly like it for the creation of jewelry.

Chevalley says

“I can confess that I feel very proud to be a pioneer using tantalum since 2007, as I didn’t see anyone in the world making jewelry out of it, and thanks to this amazing metal  I gavea unique touch to my creations “

Let’s make the presentations with tantalum :

A little physics: it is an element, a pure substance, its symbol is Ta. It is found in the mineral Tantalite and in other forms combined with oxygen. Its density is very high, almost as much as gold. Its melting point is exceeded only by 3 elements (carbon, rhenium and tungsten) and it exceeds 3000°C!

Do not confuse dark metal plating, which has a dark appearance (15 micron ruthenium thickness), with tantalum. I have even sometimes seen some of these pieces described as “black gold”, oh dear !… (I will explain the technique of plating in another article) .

This is an example of plating with ruthenium (layer of thickness: 0.1 to 0.15mm), also sometimes called “black gold”, almost the same colour as tantalum.

Tantalum has a bluish grey colour, it is rather dark. Depending on the finish, the colour can range from anthracite grey to blue grey and can take aspects similar to concrete, as in this examples:

The advantages offered by tantalum in the jewerly creation are multiple, but this metal requires very particular skills. It is ductile but very hard at the same time. When able to play with its different properties, it is possible to create pieces combining aesthetics and durability.

This metal is also biocompatible, which means, in simpler terms – there can’t be allergy.


Here on the left you can see a compilation of rings made of natural tantalum, not as black as it can be .

By Cbijoux / Cbijou we have a secret process to turn the tantalum to very dark, almost black, and this process makes the surface a unique dark very long lasting effect .


As Unique as You Are


Wedding Rings

Cbijou is committed to the finest craftsmanship, environmental ethics and materials. The rings you choose for your wedding should be remarkable – just like the moment you say, “I do.” 


Engagement Rings

Engagement rings signify something momentous: the instant that two people decide to spend the rest of their lives together. Our rings are made to commemorate your special moment; their one-of-a-kind artistry is designed to capture the day you’ll never want to forget. 


Contemporary Rings 

Why we wear rings goes far beyond nuptial traditions; rings are a mode of self expression and offer a unique opportunity to celebrate life – with or without any special occasion. Cbijou offers rings for every gorgeous moment life has to offer. And, just like those moments, no two rings are ever made exactly the same.

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Visit cbijoux.com to see a wider range of jewelry designs, but also the FB page here .

Creation of custom rings by Cbijou© instructions for use, click here.

To know more about tantalum, in a scientific way here is the link to the Wikipedia article.

Here, you can buy them at the ounce: Rare world metal mint

Rare world metal mint

and here some info in english from RWMmint :

Tantalum has a high melting point and strength, good ductility, is corrosion resistant, and is highly conductive of electricity and heat. These properties make it useful in the production of capacitors and other electronic components and its superalloys are used in the aerospace, nuclear, and medical industries. Approximately 60% of worldwide tantalum production comes from South America and Australia. Worldwide production in 2012 was only 765 tonnes of tantalum, compared with 2700 tonnes of gold. Please see the below links for more information.Black/dark grey tantalum jewels

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