Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.0-3.33.05-3.08
1
7.18
👆🏻
Fracture
Uneven, Conchoidal, Conchoidal to uneven
Subconchoidal, Uneven, Conchoidal
Cleavage
On {10 1 1} perfect; parting on {10 1 2}
Poor on {100}
Mohs Hardness
3.5-45
2
10
👆🏻
Chemical Composition
MnCO3
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)