Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
3.05-3.214.1-4.3
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Splintery
Uneven
Cleavage
Good on {110}, poor on {100}
Indistinct on {011}
Mohs Hardness
7.53.5-4
2
10
👆🏻
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
CuFeS 2Anthony et al , Handbook of mineralogy (2001)