Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.082.69-2.79
1
7.18
👆🏻
Fracture
Subconchoidal, Uneven, Conchoidal
Conchoidal
Cleavage
Poor on {100}
Poor on {0001}
Mohs Hardness
55.5-6.5
2
10
👆🏻
Chemical Composition
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references