Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.90-4.002.50
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal
Cleavage
Perfect on {001}, good on {210}, poor on {010}
Distinct on {100} and {110}
Mohs Hardness
3-3.55.5-6
2
10
👆🏻
Chemical Composition
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
3NaAlSi 3O 8 · NaClAnthony et al , Handbook of mineralogy (2001)