Sardonyx and Afghanite Physical Properties

Sardonyx

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

2.55-2.702.55-2.65

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Not Available

Perfect {10 1 0}

1.7 Mohs Hardness

6.5-75.5-6

2 10

1.8 Chemical Composition

SiO 2Ulrich Henn and Claudio C.

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

Sardonyx and Afghanite Chemical Formula

While comparing Sardonyx 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 Sardonyx and Afghanite chemical formula.

Chemical formula of Sardonyx- SiO 2Ulrich Henn and Claudio C.
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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Sardonyx and Afghanite Specific Gravity

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