Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.50-5.902.6-3.3
1
7.18
👆🏻
Fracture
Conchoidal
Lamellar
Cleavage
On {10 1 0}, perfect; parting on {000 1 }
Perfect 001
Mohs Hardness
42-2.5
2
10
👆🏻
Chemical Composition
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)
(Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6