Tenacity
Brittle
Flexible
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.79-2.872.20-2.40
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal, Splintery, Fibrous
Cleavage
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
Perfect on {010}, distinct on {100}
Mohs Hardness
5.5-62
2
10
👆🏻
Chemical Composition
NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)