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What is marcasite?

Published on 26/08/2013

marcassite brute


Marcasite has the same chemical composition as pyrite: FeS2, the same hardness (6-61/2), the same appearance and the same deposits, iron ore mines. The only difference is their Crystal System: orthorhombic for marcasite and cubic for pyrite.

Mystic topaz

Published on 26/08/2013

topaze brute

Much of the Topaz that is found in nature is colorless, or white. In order to add colour, the gem can be treated: it is then coated with an ultra-thin layer, which is similar to the coatings used on camera lenses.

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