Staurolite and Augite Physical Properties

Staurolite

Augite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.7-3.83.19-3.56

1 7.18

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Fracture

Subconchoidal, Conchoidal

Uneven, Conchoidal

Cleavage

Distinct on {010}

{110} Perfect, {010} Indistinct

Mohs Hardness

7-7.55.5-6

2 10

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Chemical Composition

(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.

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

Staurolite and Augite Chemical Formula

While comparing Staurolite 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 Staurolite and Augite chemical formula.

Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Chemical formula of Augite- (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)

Compare Brown Gemstones

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Staurolite Vs Mottramite

Staurolite and Augite Specific Gravity

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