Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.6-3.32.60-2.65
1
7.18
👆🏻
Fracture
Lamellar
Uneven, Conchoidal
Cleavage
Perfect 001
Perfect on {001}, very good on {010}, imperfect on {110}
Mohs Hardness
2-2.56-6.5
2
10
👆🏻
Chemical Composition
(Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)