Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.16-3.432.60-2.64
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Uneven, Splintery, Conchoidal
Cleavage
{110} Good, {110} Good
Absent
Mohs Hardness
5-66.5-7
2
10
👆🏻
Chemical Composition
(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)
SiO 2Arthur Thomas , Gemstones (2009)