Afghanite and Williamsite Physical Properties

Afghanite

Williamsite

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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

2.55-2.65

2.51-2.63

1.5 Fracture

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

Conchoidal, Conchoidal, Handbook of mineralogy (2001)

1.6 Cleavage

Perfect {10 1 0}

Not Available

1.7 Mohs Hardness

5.5-6

1.8 Chemical Composition

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

(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)

Afghanite and Williamsite Chemical Formula

While comparing Afghanite and Williamsite 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 Williamsite 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 Williamsite- (Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)

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Afghanite and Williamsite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Afghanite and Williamsite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Afghanite and Williamsite Optical Properties during the identification of gemstone. Specific gravity of Afghanite is 2.51-2.63 whereas that of Williamsite is 2.51-2.63.