Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.90-4.002.72-2.75
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
Perfect on {001}, good on {210}, poor on {010}
Perfect on [001], good on [010], imperfect on [110]
Mohs Hardness
3-3.56-6.5
2
10
👆🏻
Chemical Composition
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)