Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.79-3.945.9-6.3
1
7.18
👆🏻
Fracture
Lamellar, Splintery
Conchoidal, Uneven
Cleavage
{100} Good, {001} Good, {010} Poor
On {101}, distinct; on {112}, interrupted; on {001}, indistinct
Mohs Hardness
44.5-5
2
10
👆🏻
Chemical Composition
FeAs
CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references