Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
3.79-3.943.25-3.35
1
7.18
👆🏻
Fracture
Lamellar, Splintery
Conchoidal, ConchoidalWalter Schumann
Cleavage
{100} Good, {001} Good, {010} Poor
Perfect in three directions
Mohs Hardness
45
2
10
👆🏻
Chemical Composition
FeAs
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references