Afghanite and Hardystonite Physical Properties

Afghanite

Hardystonite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.653.396-3.443

1 7.18

1.5 Fracture

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

Brittle, Metallic

1.6 Cleavage

Perfect {10 1 0}

[001] good, [100] and [110] fair

1.7 Mohs Hardness

5.5-63-4

2 10

1.8 Chemical Composition

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

Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)

Afghanite and Hardystonite Chemical Formula

While comparing Afghanite and Hardystonite 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 Afghanite and Hardystonite 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)
Chemical formula of Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)

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Afghanite and Hardystonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Afghanite and Hardystonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Afghanite and Hardystonite Optical Properties during the identification of gemstone. Specific gravity of Afghanite is 3.396-3.443 whereas that of Hardystonite is 3.396-3.443.