Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.212.58-2.64
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Splintery
-
Cleavage
Good on {110}, poor on {100}
None
Mohs Hardness
7.56.5-7
2
10
👆🏻
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
SiO 2Walter Schumann , Gemstones of the world (2001)