Tenacity
-
-
Solubility
-
insoluble
Durability
-
-
Specific Gravity
3.122.36
1
7.18
👆🏻
Fracture
Uneven
Uneven, Subconchoidal, Fibrous
Cleavage
None
[110] perfect, [101] good, [010] distinct
Mohs Hardness
-99993.5-4
2
10
👆🏻
Chemical Composition
Ca 9(Mg,Fe2+ )(PO 4) 6(PO 3OH)Anthony et al , Handbook of mineralogy (2001)
Al 3(PO 4) 2(OH,F) 3 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references