Tenacity
-
Flexible
Solubility
-
Soluble
Durability
-
-
Specific Gravity
3.502.20-2.40
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Conchoidal, Splintery, Fibrous
Cleavage
None
Perfect on {010}, distinct on {100}
Mohs Hardness
72
2
10
👆🏻
Chemical Composition
Mn 3B 7O 13ClMichael OâDonoghue , Gems, Sixth Edition (2006)
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)