Staurolite and Cuprite Physical Properties

Staurolite

Cuprite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.7-3.85.85-6.15

1 7.18

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Fracture

Subconchoidal, Conchoidal

Conchoidal

Cleavage

Distinct on {010}

Fair in four directions forming octahedrons

Mohs Hardness

7-7.53.5-4

2 10

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Chemical Composition

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

Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Staurolite and Cuprite Chemical Formula

While comparing Staurolite and Cuprite 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 Cuprite chemical formula.

Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Chemical formula of Cuprite- Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Staurolite and Cuprite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Staurolite and Cuprite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Cuprite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 5.85-6.15 whereas that of Cuprite is 5.85-6.15.