Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.082.55-2.65
1
7.18
👆🏻
Fracture
Subconchoidal, Uneven, Conchoidal
Subconchoidal, Conchoidal
Cleavage
Poor on {100}
[1010] Poor
Mohs Hardness
55-6
2
10
👆🏻
Chemical Composition
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.