Peridot is a semi-precious natural stone that is especially valued for its bright green color. It displays very distinctive shades that can vary from olive green to linden green and apple green. In most cases, it appears transparent. Peridot crystals are notable for forming at depths equivalent to those of diamonds. It is quite likely…

Onyx is a natural, semi-precious stone belonging to the family of calcedonies. Onyx displays a deep black color and can occur under various aspects, from opaque to slightly translucent. Onyx is a stone the Romans highly valued and which they would use to craft seals and cameos. L’origine du mot onyx provient du grec onux,…