Ca5(PO4)3(OH) + collagenHexagonal
Ivory
Ca5(PO4)3(OH) + collagen
OrganicChemical FormulaCa5(PO4)3(OH) + collagen
Crystal SystemHexagonal
Mohs Hardness2.5
Specific Gravity1.8
ColorWhite, yellowish
LusterDull to waxy
StreakWhite
CleavageNone
FractureSplintery
Occurrence
Natural material from animal teeth/tusks. Trade heavily restricted. Vegetable ivory from palm seeds.