Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.25.5
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Conchoidal
Cleavage
None
{111} Indistinct, {111} Indistinct, {111} Indistinct
Mohs Hardness
5.5-6.55-5.5
2
10
👆🏻
Chemical Composition
Fe 3O 4Ulrich Henn and Claudio C.
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references