grossular
Sign in to saveGrossular 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.
Key facts
- Mineral.name
- Grossular
- Mineral.category
- Nesosilicate
- Mineral.boxbgcolor
- 852436
- Mineral.boxtextcolor
- FFFFFF
- Mineral.image
- Grossular-ww51a.jpg
- Mineral.imagesize
- 260px
- Mineral.caption
- Grossular dodecahedron, 7 mm across, from Coahuila, Mexico
- Mineral.formula
- Ca3Al2(SiO4)3
- Mineral.IMAsymbol
- Grs
- Mineral.strunz
- 9.AD.25
- Mineral.system
- Cubic
- Mineral.class
- Hexoctahedral (mm) H-M Symbol: (4/m 2/m)
- Mineral.symmetry
- Iad
- Mineral.streak
- Brown
- Mineral.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
- Mineral.cleavage
- none
- Mineral.fracture
- conchoidal to uneven
- Mineral.mohs
- 6.5 to 7
via Wikipedia infobox
Article
6 sectionsContents
- Hessonite
- Deposits
- Cultural significance
- See also
- References
- External links
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.
In geological literature, grossular has often been called grossularite. Since 1971, however, use of the term grossularite for the mineral has been discouraged by the International Mineralogical Association.