Augite and Corundum Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
insoluble
Durability
Not Available
Not Available
Specific Gravity
3.19-3.56
3.90-4.05
Fracture
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Uneven, Uneven, Gems, Difficult, Fibrous
Cleavage
{110} Perfect, {010} Indistinct
None – parting in 3 directions
Chemical Composition
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)
Al 2O 3Arthur Thomas , Gemstones (2009)
Augite and Corundum Chemical Formula
While comparing Augite and Corundum physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Augite and Corundum chemical formula.
- Chemical formula of Augite- (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)
- Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
Augite and Corundum Specific Gravity
Another important criteria for qualitative analysis of gemstones is Augite and Corundum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Augite and Corundum Optical Properties during the identification of gemstone. Specific gravity of Augite is 3.90-4.05 whereas that of Corundum is 3.90-4.05.