Apatite
Chemical Formula	Ca5(PO4)3(F,Cl,OH)
Species	Phosphates
Crystal System	Hexagonal
Mohs Scale	5
Specific Gravity	3.16-3.22
Color	Transparent to translucent, usually green, less often colorless, yellow, blue to Purple, pink, brown.[1]
Streak	White
Luster	Vitreous[1] to subresinous
Refractive Index	1.634–1.638 (+0.012, ?0.006)[1]
Diaphaneity	Transparent to translucent[2]
Cleavage	indistinct, indistinct
Fracture	Conchoidal to uneven[1]
Crystal Habit：Tabular, prismatic crystals, massive, compact or granular