Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.13-3.753.05-3.08
1
7.18
👆🏻
Fracture
Subconchoidal, Uneven, Conchoidal
Subconchoidal, Uneven, Conchoidal
Cleavage
Poor on {100}
Poor on {100}
Mohs Hardness
65
2
10
👆🏻
Chemical Composition
(Mg,Fe2+ ) 9(SiO 4) 4(F,OH)) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)