Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.212.58-2.80
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Splintery
Uneven, Irregular
Cleavage
Good on {110}, poor on {100}
Perfect
Mohs Hardness
7.55.5
2
10
👆🏻
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)