Properties
| Category | Nesosilicate |
|---|---|
| Formula | Ca3Al2(SiO4)3 |
| Crystal system | Cubic |
| Color | light to dark green, light to dark yellow to reddish brown, brown, orange, red, yellow, green, white, occasionally translucent to opaque pink. It is also but rarely found in colorless form |
| Cleavage | none |
| Fracture | conchoidal to uneven |
| Mohs scale hardness | 6.5 to 7 |
| Luster | greasy to vitreous |
| Streak | Brown |
| Specific gravity | 3.61 (+.15/−.04) |
From the Wikipedia article
Grossular is a calcium-aluminium species of the garnet group of minerals. It has the chemical formula of Ca3Al2(SiO4)3 but the calcium may, in part, be replaced by ferrous iron and the aluminium by ferric iron. The name grossular is derived from the botanical name for the gooseberry, grossularia, in reference to the green garnet of this composition that is found in Siberia. Other shades include cinnamon brown (cinnamon stone variety), red, and yellow. Grossular is a gemstone.
Source
Source record: crystal-compendium/hessonite/minerals.json. Fetched from English Wikipedia by the operator 2 October 2026.
https://en.wikipedia.org/wiki/Grossular — revision id 1348180579. Text and properties from Wikipedia, licensed CC BY-SA 4.0.