Uvarovite

Refractive Index : 1.870 – 1.740

Optical Characteristic : SR

Specific Gravity : 3.80 – 3.40

Formula : Ca3Cr2Si3O12

Crystal System : Cubic

Variety/Species : Ugrandite

Species/Group : Garnet Group

Birefringence : N/A

Dispersion : N/A

Hardness : 7 to 7.5

Toughness : Poor

Ultrasonic : Never

Steam : Never

UV Long : Inert

UV Short : Inert

Pleochroism : None

Strength : N/A

Pleochroism Colors : None

Heat : Sensitive

Acids : Sensitive

Light : Stable

Polish Luster : Vitreous

Fracture : Conchoidal

Fracture Luster :

Clarity Type : N/A

Tones : N/A

Saturations : N/A

Cause of Color :

Enhancements : None

Cleavage : None. May show indistinct parting.

Color Range : Green, dark green, greenish

Transparency : Semitranslucent to Opaque

Phenomena : None

Separations : Uvarovite from-

Identifying Characteristics and information
Not usually cut as a gem because the crystals are too small and are usually opaque.

Spectral Data
Not diagnostic

Trade Names and Misnomers
Chromiun Garnet
Goldmanite
Henritermierite
Kimzeyite
Uvarovite
Yamatoite

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