Tenacity
Flexible
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
2.20-2.402.74-2.76
1
7.18
👆🏻
Fracture
Conchoidal, Splintery, Fibrous
Uneven
Cleavage
Perfect on {010}, distinct on {100}
{010} Perfect, {001} Distinct
Mohs Hardness
23.5-4
2
10
👆🏻
Chemical Composition
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)