Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.90-4.002.77
1
7.18
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Fracture
Conchoidal
Uneven
Cleavage
Perfect on {001}, good on {210}, poor on {010}
Perfect [001] good [010] poor [110]
Mohs Hardness
3-3.56-6.5
2
10
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Chemical Composition
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)