Staurolite and Turquoise Physical Properties

Staurolite

Turquoise

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Physical Properties

Tenacity

Brittle

Solubility

Soluble

Durability

Specific Gravity

3.7-3.82.30-2.90

1 7.18

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Fracture

Subconchoidal, Conchoidal

Conchoidal

Cleavage

Distinct on {010}

Good to perfect_usually N/A

Mohs Hardness

7-7.55-6

2 10

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Chemical Composition

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

CuAl₆(PO₄)₄(OH)₈ • 4H₂O

Staurolite and Turquoise Chemical Formula

While comparing Staurolite and Turquoise 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 Turquoise chemical formula.

Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Chemical formula of Turquoise- CuAl₆(PO₄)₄(OH)₈ • 4H₂O

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Staurolite and Turquoise Specific Gravity

Another important criteria for qualitative analysis of gemstones is Staurolite and Turquoise Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Turquoise Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 2.30-2.90 whereas that of Turquoise is 2.30-2.90.