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