Input interpretation
grossular (mineral)
Image
Image
General properties
alternate names | colophonite | ernite | hessonite | essonite | garnet jade | gooseberry-garnet | grossular garnet | grossularite | hessonite | pechgranat | romanzovite | south african jade | viluite formula | Ca_3Al_2(SiO_4)_3
Basic properties
density | 3.57 g/cm^3 transparency | transparent | subtranslucent birefringence | 0 luster | vitreous | resinous Mohs hardness | 7 tenacity | brittle streak | brownish white magnetism | nonmagnetic color | brown | colorless | green | gray | yellow fracture | subconchoidal molar mass | 450.5 g/mol (grams per mole)
Units
Mineral identifiers
Strunz ID | VIII/A.08-70 Dana ID | 51.4.3b.2
Crystallographic properties
crystal system | cubic crystal class | 4/m-32/m unit cell volume | 1664 Å^3 (cubic ångströms) d-spacing | 2.65 Å (ångströms) | 1.58 Å (ångströms) | 2.96 Å (ångströms) intensity | 100% | 90% | 80% molecules per unit cell | 8 molecules per cell refractive indices | 0 | 0 | 0 | 0 | 0 | 1.734 dispersion | weak unit cell lengths | 11.85 Å (ångströms) | 11.85 Å (ångströms) | 11.85 Å (ångströms) unit cell angles | 90° (degrees) | 90° (degrees) | 90° (degrees)
Wikipedia summary
Grossular is a calcium-aluminium species of the garnet group of minerals. It has the chemical formula of Ca_3Al_2(SiO_4)_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.