Uvarovite

Formula: Ca3Cr2(SiO4)3

Colour: Green, emerald-green, green-black

Lustre: Vitreous

Hardness: 6½ – 7

Specific Gravity: 3.77 – 3.81

Crystal System: Isometric

Member of: Garnet Group > Garnet Supergroup; Grossular-Uvarovite Series.

Name: Named after Count Sergey Semeonovich Uvarov (1786-1855), Russian statesman and scholar, President of the Academy of St Petersburg (1818-1855).

Type Locality: Saranovskii Mine (“Rudnaya” underground chromite mine; Glavnoe Saranovskoe deposit), Saranovskaya Village (Sarany), Gornozavodskii District, Perm Krai – Russia

Uvarovite is the name given to the green calcium chromium garnet end member.
The name has frequently been misused in the past to refer to other green and/or chromium-bearing garnets, many so-called ‘Uvarovites’ are actually chromian Grossular, chromian Pyrope, green Andradite (the so-called Iranian ‘uvarovite’) or even the rare Knorringite (magnesium chromium garnet).