Apatite
ID: 131
Apatite
Chemical Formula
Ca5(PO4)3(F,Cl,OH)
Hardness (Mohs)
5
Crystal System
Hexagonal
Streak
White
Luster
Vitreous to greasy
Diaphaneity
Transparent to translucent
Color
Green, blue, yellow, purple, pink, colorless, brown
Crystal Habit / Mode of Occurrence
Prismatic, tabular, or equant crystals; massive, granular, fibrous
Fun Facts
Apatite is the mineral that makes up a significant portion of tooth enamel and bone.