Tenacity
-
Brittle
Solubility
-
insoluble in water
Durability
-
-
Specific Gravity
1.58-1.605.00-5.20
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal, ConchoidalWalter Schumann
Cleavage
{011} Imperfect
Indistinct on {001}; partings on {011} and {111}
Mohs Hardness
26-6.5
2
10
👆🏻
Chemical Composition
Al 2(Cl 2O 12) · 18H 2OUlrich Henn and Claudio C.
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references