Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.55-2.703.19-3.56
1
7.18
👆🏻
Fracture
-
Uneven, Conchoidal
Cleavage
None
{110} Perfect, {010} Indistinct
Mohs Hardness
6.5-75.5-6
2
10
👆🏻
Chemical Composition
SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)