Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
3.79-3.943.30-3.50
1
7.18
👆🏻
Fracture
Lamellar, Splintery
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
{100} Good, {001} Good, {010} Poor
Perfect on {110}, poor on {101}, {001} rare
Mohs Hardness
45
2
10
👆🏻
Chemical Composition
FeAs
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references