Staurolite and Beryllonite Physical Properties

Staurolite

Beryllonite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.7-3.82.79-2.87

1 7.18

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Fracture

Subconchoidal, Conchoidal

Conchoidal

Cleavage

Distinct on {010}

{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces

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.

NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Staurolite and Beryllonite Chemical Formula

While comparing Staurolite and Beryllonite 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 Beryllonite chemical formula.

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

Compare Brown Gemstones

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Staurolite and Beryllonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Staurolite and Beryllonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Beryllonite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 2.79-2.87 whereas that of Beryllonite is 2.79-2.87.