Uvarovite is a mineral of the garnet group, named after Count Uvarov, President of the Academy of Sciences of the Russian Empire. Forms green crystals due to chromium impurities. Large crystals are rare.
You can see uvarovite stone for sale and buy it in the Minerals of Russia online store.
General | |
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Category | Nesosilicate |
Formula (repeating unit) |
Ca3Cr2Si3O12 |
IMA symbol | Uv |
Strunz classification | 9.AD.25 |
Crystal system | Cubic |
Crystal class | Hexoctahedral (m3m) H-M symbol: (4/m 3 2/m) |
Space group | Ia3d |
Unit cell | a = 11.99 Å; Z = 8 |
Identification | |
Color | Green, emerald-green, green-black |
Crystal habit | Euhedral crystals, granular, massive |
Fracture | Uneven, conchoidal |
Mohs scale hardness | 6.5–7.5 |
Luster | Vitreous |
Streak | White |
Diaphaneity | Transparent, translucent |
Specific gravity | 3.77 - 3.81 |
Optical properties | Isotropic |
Refractive index | n = 1.865 |
Other characteristics | Fluorescent red in both short and long UV |