Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.6-3.33.90-4.00
1
7.18
👆🏻
Fracture
Lamellar
Conchoidal
Cleavage
Perfect 001
Perfect on {001}, good on {210}, poor on {010}
Mohs Hardness
2-2.53-3.5
2
10
👆🏻
Chemical Composition
(Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references