Uvarovite druse from Urals Region, Russia (size: 18.3 x 13.1 x 2.0 cm)
|Crystal symmetry||Isometric hexoctahedral
H-M symbol (4/m32/m)
Space group: I a3d
|Unit cell||a = 11.99 Å; Z=8|
|Color||Green, emerald-green, green-black|
|Crystal habit||Euhedral crystals, granular, massive|
|Mohs scale hardness||6.5-7.5|
|Specific gravity||3.77 - 3.81|
|Refractive index||n = 1.865|
|Other characteristics||Fluorescent red in both short and long UV|
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 rarest of the garnet group minerals, and is the only consistently green garnet species, with an emerald-green color. It occurs as well-formed fine-sized crystals.
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