Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.6-3.32.55-2.65
1
7.18
👆🏻
Fracture
Lamellar
Conchoidal
Cleavage
Perfect 001
Perfect {10 1 0}
Mohs Hardness
2-2.55.5-6
2
10
👆🏻
Chemical Composition
(Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6
(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)