Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.90-4.00-9999
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
Perfect on {001}, good on {210}, poor on {010}
None
Mohs Hardness
3-3.53-4
2
10
👆🏻
Chemical Composition
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Celestite, Andalusite, Feldspar, Dolomite, Gypsum, Halloysite, Kaolinite, Montmorillonite, Sepiolite, Smectite, Vermiculite