Tenacity
Brittle
Flexible
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.90-3.002.20-2.40
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Conchoidal, Splintery, Fibrous
Cleavage
None
Perfect on {010}, distinct on {100}
Mohs Hardness
5-5.52
2
10
👆🏻
Chemical Composition
CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)