Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.76-3.773.87-4.14
1
7.18
👆🏻
Fracture
-
Subconchoidal, Conchoidal
Cleavage
{110} Perfect, {110} Perfect
Poor on {120}, in traces on {001}
Mohs Hardness
5-65.5-6
2
10
👆🏻
Chemical Composition
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references