uvarovite

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Photo courtesy of Mardon Jewelers

Species:  Uvarovite
Group:  Garnet
Mohs Hardness:  6.5 to 7.5 out of 10
Color:  Light to dark green, yellow green or brownish green
RI:  OTL (can be 1.798 to 1.864, but crystals are too small to test)
Birefringence:  None
SR/DR/AGG:  AGG
Clarity Type:  Type II
Pleochroism:  None
Spectrum:  Not diagnostic
Fluorescence:  Not diagnostic
Color Filter:  Possibly pinkish for green stones
SG:  3.71 to 3.81

uvarovite facts

Garnets occur in nearly every color.

Uvarovite garnet occurs in different shades of green.
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Uvarovite occurs in irregular aggregates of tiny, closely packed crystals on a rock matrix.