Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.643.16-3.43
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
Uneven, Conchoidal
Cleavage
Absent
{110} Good, {110} Good
Mohs Hardness
6.5-75-6
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)