Lawsonite and Afghanite Physical Properties

Lawsonite

Afghanite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.092.55-2.65

1 7.18

1.5 Fracture

White, Yellow, Pale blue, Brittle, Uneven

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

1.6 Cleavage

Perfect on {100} and {010}, imperfect on {101}

Perfect {10 1 0}

1.7 Mohs Hardness

85.5-6

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)

Lawsonite and Afghanite Chemical Formula

While comparing Lawsonite 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 Lawsonite 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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Lawsonite and Afghanite Specific Gravity

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