CLASS: Nesosilicate . . . CHEMICAL FORMULA: (Ca, Fe, Mg, Mn)3 (Al, Fe, Mn, Cr, Ti, V)2 ( SiO4)3 . . .CRYSTAL SYSTEM: cubic
CRYSTAL FORM: rhombodecahedron, trapezohedron
COLOR: brown (andradite), reddish (pyrope), black (andradite (var. melanite)), yellow (grossular (var. hessonite)), orange (spessartine), green (uvarovite), colorless
PHYSICAL PROPERTIES: very hard (6,5/7,5 Mohs), heavy (3,52/4,32 g/cm3), fragile, lack of cleavage, transparent to opaque, with an adamantine/resinous shine and unassailable by acids.
CURIOSITIES: related to regeneration and personal improvement.