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Uvarovite

>> Group(s) : garnets, silicates
See the pictures :

It is a green garnet. Named in honor of a Russian count and statesman, Sergey Uvarov Semeonovich (1786-1855).
It is rarely found in gem quality. Its green color is due to chromium.

Exploited sites

It is found in France (Pyrenees), Russia (Urals), Canada, United States (California), Madagascar, Finland, India (Himalayas), Poland.

See pictures of the mines / other pictures

Use in jewelry

limited because little transparent, it’s a collection stone

Looking alike stones

andradite , diopside , emerald , grossular , tourmaline

Imitations and treatments

Imitated by green garnet / glass doublets in a rather misleading way

Chemical characteristics
Ca3Cr3[SiO4]3

chromium and calcium silicate

Physical characteristics

Main color : green

emerald green

Color of streak : white

Luster : vitreous

Hardness : 6.5 to 7.5

Density : 3.77

Cleavage : indistinct

Fracture : conchoidal, uneven

Optical properties

Transparency : transparent, translucent

rarely transparent

Refractive Index : 1.870

Double refraction : 0.000

None, isotropic, but sometimes rocks exhibit a polarization anomaly

visible double refraction : no

Dispersion : 0.027 (0.014)

Pleochroism : absent

Number of colors : 1

Isotropic

uvarovite spectrum system

uvarovite spectrum system

Fluorescence : none

Crystals

Very small but well shaped hexoctahedra, dodecahedra

cristaux

Crystal system : cubic

Other informations

Astrological sign : Virgo, Sagittarius

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Correspondance
astrological
  • Virgo Virgo
  • Sagittarius Sagittarius

Helps not to think negatively, or be influenced negatively.