Hydrogrossular
A variety of Grossular Garnet
Uncommon
What is Hydrogrossular?
Hydrogrossular is a garnet variety that is different from the other garnets in that it is never transparent. Its most common color is a bluish green. It can be cut into various gems, although it is not used as extensively as the other types of garnets. Hydrogrossular is sometimes used for cabuchons or made into beads.
Optical Properties
- Refractive Index
- 1.680-1.712
- Optical Character
- Isotropic
- Dispersion
- 0.02
Discover Values
Rarity
4.0out of 5.0
80%
Popularity
3.5out of 5.0
70%
Beauty
4.1out of 5.0
82%
Cultural Value
3.8out of 5.0
76%
Collection Value
4.1out of 5.0
82%
Hydrogrossular Market Value Calculator
Estimate the market value of Hydrogrossular using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Hydrogrossular Localities Map
See where Hydrogrossular is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Map preview
North ZoneCentral RidgeSouth Basin
Quick Facts
Physical Properties
- Color
- Green to bluish green, greenish yellow, pink, white, colorless, and gray
- Hardness (Mohs)
- 7 - 7.5
- Density
- 3.25 - 3.4 g/cm³
- Streak
- White
- Luster
- Vitreous
- Crystal System
- Isometric
Chemical Properties
- Chemical Formula
- Ca3Al2(SiO4 )3-x (OH)4x - where 0 < x < 1.5
- Elements
- Al, Ca, O, Si
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