Beryllonite and Afghanite Physical Properties

Beryllonite

Afghanite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

2.79-2.872.55-2.65

1 7.18

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Fracture

Conchoidal

Cleavage

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

Perfect {10 1 0}

Mohs Hardness

5.5-65.5-6

2 10

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Chemical Composition

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

(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)

Beryllonite and Afghanite Chemical Formula

While comparing Beryllonite and Afghanite 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 Beryllonite and Afghanite chemical formula.

Chemical formula of Beryllonite- NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)

Compare Colorless Gems

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Beryllonite and Afghanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Beryllonite and Afghanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Beryllonite and Afghanite Optical Properties during the identification of gemstone. Specific gravity of Beryllonite is 2.55-2.65 whereas that of Afghanite is 2.55-2.65.