Tenacity
Flexible
Brittle
Solubility
Soluble
-
Durability
-
-
Specific Gravity
2.20-2.402.90-3.00
1
7.18
👆🏻
Fracture
Conchoidal, Splintery, Fibrous
Conchoidal, Uneven
Cleavage
Perfect on {010}, distinct on {100}
None
Mohs Hardness
25-5.5
2
10
👆🏻
Chemical Composition
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references