Staurolite and Axinite Physical Properties

Staurolite

Axinite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.7-3.83.26-3.36

1 7.18

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Fracture

Subconchoidal, Conchoidal

Conchoidal

Cleavage

Distinct on {010}

Good on {100}

Mohs Hardness

7-7.56.5-7

2 10

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Chemical Composition

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

(Ca,Fe,Mn,Mg) 3Al 2BSi 4O 15(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Staurolite and Axinite Chemical Formula

While comparing Staurolite and Axinite 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 Axinite chemical formula.

Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Chemical formula of Axinite- (Ca,Fe,Mn,Mg) 3Al 2BSi 4O 15(OH)Walter Schumann , Gemstones of the world (2001) More from other references

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Staurolite and Axinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Staurolite and Axinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Axinite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 3.26-3.36 whereas that of Axinite is 3.26-3.36.