Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.643.05-3.21
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
Uneven, Subconchoidal, Splintery
Cleavage
Absent
Good on {110}, poor on {100}
Mohs Hardness
6.5-77.5
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references