Tenacity
Flexible
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
2.20-2.402.90-3.10
1
7.18
👆🏻
Fracture
Conchoidal, Splintery, Fibrous
Splintery, Granular
Cleavage
Perfect on {010}, distinct on {100}
None
Mohs Hardness
26-6.5
2
10
👆🏻
Chemical Composition
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references