Tenacity
-
-
Solubility
-
Insoluble in acids
Durability
-
-
Specific Gravity
3.76-3.774.20-4.30
1
7.18
👆🏻
Fracture
-
Uneven, Conchoidal
Cleavage
{110} Perfect, {110} Perfect
{110} good, 100 moderate, parting on {092} and {011}
Mohs Hardness
5-66-6.5
2
10
👆🏻
Chemical Composition
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)