Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.90-4.002.95-3.07
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
Perfect on {001}, good on {210}, poor on {010}
Perfect on {110} at 56° and 124°; partings on {010} and {100}
Mohs Hardness
3-3.55-6
2
10
👆🏻
Chemical Composition
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 2Mg 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.