Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.123.87-4.14
1
7.18
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Fracture
Uneven
Subconchoidal, Conchoidal
Cleavage
None
Poor on {120}, in traces on {001}
Mohs Hardness
-99995.5-6
2
10
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Chemical Composition
Ca 9(Mg,Fe2+ )(PO 4) 6(PO 3OH)Anthony et al , Handbook of mineralogy (2001)
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references