Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.79-3.943.87-4.14
1
7.18
👆🏻
Fracture
Lamellar, Splintery
Subconchoidal, Conchoidal
Cleavage
{100} Good, {001} Good, {010} Poor
Poor on {120}, in traces on {001}
Mohs Hardness
45.5-6
2
10
👆🏻
Chemical Composition
FeAs
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references