Jet and Afghanite Physical Properties

Jet

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

1.19-1.352.55-2.65

1 7.18

1.8 Fracture

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

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

1.9 Cleavage

Not Available

Perfect {10 1 0}

1.10 Mohs Hardness

2.5-45.5-6

2 10

1.12 Chemical Composition

Not Available

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

Jet and Afghanite Chemical Formula

While comparing Jet 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 Jet and Afghanite chemical formula.

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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Jet and Afghanite Specific Gravity

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