Tenacity
-
-
Solubility
insoluble in water
-
Durability
-
-
Specific Gravity
3.62-3.873.19-3.56
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal
Cleavage
None
{110} Perfect, {010} Indistinct
Mohs Hardness
7-7.55.5-6
2
10
👆🏻
Chemical Composition
Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)