Tenacity
-
Brittle
Solubility
-
insoluble in water
Durability
-
-
Specific Gravity
3.05-3.085.00-5.20
1
7.18
👆🏻
Fracture
Subconchoidal, Uneven, Conchoidal
Uneven, Conchoidal, ConchoidalWalter Schumann
Cleavage
Poor on {100}
Indistinct on {001}; partings on {011} and {111}
Mohs Hardness
56-6.5
2
10
👆🏻
Chemical Composition
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references