Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.90-4.002.6-3.3
1
7.18
👆🏻
Fracture
Conchoidal
Lamellar
Cleavage
Perfect on {001}, good on {210}, poor on {010}
Perfect 001
Mohs Hardness
3-3.52-2.5
2
10
👆🏻
Chemical Composition
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6