Augite and Spinel Physical Properties

Augite

Spinel

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

none

1.3 Durability

Not Available

1.4 Specific Gravity

3.19-3.563.64-3.66

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

{110} Perfect, {010} Indistinct

None, but may exhibit slight parting

1.7 Mohs Hardness

5.5-68

2 10

1.8 Chemical Composition

(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)

MgAl₂O₄

Augite and Spinel Chemical Formula

While comparing Augite and Spinel 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 Spinel 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 Spinel- MgAl₂O₄

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Augite and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Augite and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Augite and Spinel Optical Properties during the identification of gemstone. Specific gravity of Augite is 3.64-3.66 whereas that of Spinel is 3.64-3.66.