Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.90-4.003.25
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
Perfect on {001}, good on {210}, poor on {010}
Imperfect in one direction
Mohs Hardness
3-3.55-5.5
2
10
👆🏻
Chemical Composition
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)