Tenacity
Brittle
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
3.83-3.893.25-3.35
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Conchoidal, ConchoidalWalter Schumann
Cleavage
Perfect on {01 1 1}
Perfect in three directions
Mohs Hardness
3.5-4.55
2
10
👆🏻
Chemical Composition
Fe2+ CO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references