Hercynite and Augite Physical Properties

Hercynite

Augite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

4.393.19-3.56

1 7.18

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Fracture

Uneven

Uneven, Conchoidal

Cleavage

{111} Indistinct, {111} Indistinct, {111} Indistinct

{110} Perfect, {010} Indistinct

Mohs Hardness

7.5-85.5-6

2 10

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Chemical Composition

Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

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

Hercynite and Augite Chemical Formula

While comparing Hercynite 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 Hercynite and Augite chemical formula.

Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Chemical formula of Augite- (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)

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Hercynite and Augite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hercynite and Augite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Augite Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 3.19-3.56 whereas that of Augite is 3.19-3.56.