Variscite and Afghanite Physical Properties

Variscite

Afghanite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.42-2.582.55-2.65

1 7.18

1.5 Fracture

Conchoidal, Splintery, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle, Conchoidal, Brittle

1.6 Cleavage

[010] perfect

Perfect {10 1 0}

1.7 Mohs Hardness

4-55.5-6

2 10

1.8 Chemical Composition

AlPO₄ · 2(H₂O)

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

Variscite and Afghanite Chemical Formula

While comparing Variscite 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 Variscite and Afghanite chemical formula.

Chemical formula of Variscite- AlPO₄ · 2(H₂O)
Chemical formula of Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)

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Variscite and Afghanite Specific Gravity

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