Tenacity
Flexible
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
2.20-2.403.76-3.77
1
7.18
👆🏻
Fracture
Conchoidal, Splintery, Fibrous
-
Cleavage
Perfect on {010}, distinct on {100}
{110} Perfect, {110} Perfect
Mohs Hardness
25-6
2
10
👆🏻
Chemical Composition
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.