Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.76-3.775.50-5.90
1
7.18
👆🏻
Fracture
-
Conchoidal
Cleavage
{110} Perfect, {110} Perfect
On {10 1 0}, perfect; parting on {000 1 }
Mohs Hardness
5-64
2
10
👆🏻
Chemical Composition
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)