Pendant in uvarovite, a rare bright-green garnet. The long dimension is 2 cm (0.8 inch)
General Category Mineral Chemical formula Ca3Cr2Si3O12 Identification Color Green, emerald-green, green-black Mohs scale hardness 6.5-7.5 Luster Vitreous Streak White Diaphaneity Transparent, Translucent
Uvarovite is a chromium-bearing garnet group species with the formula: Ca3Cr2(SiO4)3. It was discovered in 1832 by Germain Henri Hess who named it after Count Sergei Semenovitch Uvarov (1765-1855), a Russian statesman and amateur mineral collector.
Uvarovite is one of the rarer of the garnet group minerals, and is the only consistently green garnet species, with a beautiful emerald-green color. It occurs as well-formed fine-sized crystals. Specimens of uvarovite are much sought after by collectors for outstanding brilliance and color.
This article about a specific silicate mineral is a stub. You can help Wikipedia by expanding it.