Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.085.85-6.15
1
7.18
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Fracture
Subconchoidal, Uneven, Conchoidal
Conchoidal
Cleavage
Poor on {100}
Fair in four directions forming octahedrons
Mohs Hardness
53.5-4
2
10
👆🏻
Chemical Composition
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references