Helenite and Afghanite Physical Properties

Helenite

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

Not Available2.55-2.65

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

Not Available5.5-6

2 10

1.8 Chemical Composition

Not Available

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

Helenite and Afghanite Chemical Formula

While comparing Helenite 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 Helenite 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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Helenite and Afghanite Specific Gravity

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