A mineral in the garnet group that commonly occurs in a green to bluish green color, sometime intergrown with idocrase.

Gemological Properties

Gemological Information for Hydrogrussular, Garnet
Color	Green, Bluish Green, Gray, White & Pink
Crystal Structure	Cubic
Refractive Index	1.72 (+.010-.050)
Durability	Good
Hardness	7
Family	Garnet
Similar stones	Jadeite, Nephrite, Idocrase, Saussurite, Rhodochrosite, Rhodonite, Thulite, Unakite
Treatments	None Known at this Time
Country of origin	Green & Pink - U.S., Canada & South Africa, White - Myanmar & China
Hydrogrossular care
Ultrasonic cleaning	Safe
Steam cleaning	Not Safe
Warm soapy water	Safe
Chemical attack	Slight Hydrofluoric Acid Reaction
Light sensitivity	Stable
Heat sensitivity	Fractures with Heat Extremes