Tenacity
-
Brittle
Solubility
-
Dilute acid
Durability
-
-
Specific Gravity
3-3.152.93-2.96
1
7.18
👆🏻
Fracture
Conchoidal
Subconchoidal, Conchoidal
Cleavage
Good on [110] and on [001]
Distinct on {010}, imperfect {110} and {011}
Mohs Hardness
6.0-6.53.5-4
2
10
👆🏻
Chemical Composition
[ ]Na2(Mg3Al2)Si8O22(OH)2
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references