grossular
grossularite

Grossular: highly symmetrical crystals.

Grossular is found in contact metamorphosed limestones with vesuvianite, diopside, wollastonite and wernerite.

Grossular: CaAl(SiO)

Grossular is a calcium-aluminium garnet with the formula Ca3Al2(SiO4)3, though the calcium may in part be replaced by ferrous iron and the aluminium by ferric iron.

Grossular is known by many other names, and also some misnomers; colophonite - coarse granules of garnet, ernite, gooseberry-garnet - light green colored and translucent, kalkthongranat, kanelstein, olyntholite/olytholite, pechgranat, romanzovite, and tellemarkite.

Two calcium-rich members of the garnet group fare much better: these are grossularite (usually brownish orange, rarely colorless, yellow, green, or pink) and andradite.

Grossular or grossularite is a calcium-aluminium mineral species of the garnet gemstone group with the formula CaAl(SiO), though the calcium may in part be replaced by ferrous iron and the aluminium by ferric iron.