Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.082.6-3.3
1
7.18
👆🏻
Fracture
Subconchoidal, Uneven, Conchoidal
Lamellar
Cleavage
Poor on {100}
Perfect 001
Mohs Hardness
52-2.5
2
10
👆🏻
Chemical Composition
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
(Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6