Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.083.95-4.10
1
7.18
👆🏻
Fracture
Subconchoidal, Uneven, Conchoidal
Uneven
Cleavage
Poor on {100}
{110} Perfect, {110} Perfect, {110} Perfect
Mohs Hardness
53.5-4
2
10
👆🏻
Chemical Composition
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references