Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-3.023.16-3.23
1
7.18
👆🏻
Fracture
-
Conchoidal, Uneven, Conchoidal to uneven
Cleavage
Perfect
[0001] indistinct, [1010] indistinct
Mohs Hardness
-99995
2
10
👆🏻
Chemical Composition
(Mg,Fe2+ ) 5Al(Si 3Al)O 10(OH) 8Anthony et al , Handbook of mineralogy (2001)
Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references