Tenacity
Flexible
Brittle
Solubility
Soluble
-
Durability
-
-
Specific Gravity
2.20-2.405.6-5.76
1
7.18
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Fracture
Conchoidal, Splintery, Fibrous
Uneven
Cleavage
Perfect on {010}, distinct on {100}
[001] perfect; [100] distinct
Mohs Hardness
22.5-3
2
10
👆🏻
Chemical Composition
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)