Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.083.08-3.12
1
7.18
👆🏻
Fracture
Subconchoidal, Uneven, Conchoidal
ConchoidalWalter Schumann
Cleavage
Poor on {100}
{010} Perfect
Mohs Hardness
57.5
2
10
👆🏻
Chemical Composition
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
BeAlSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references