Jade and Afghanite Physical Properties

Jade

Afghanite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

2.90-3.382.55-2.65

1 7.18

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Fracture

Splintery

Conchoidal

Cleavage

1 or 2,2 prismatic.

Perfect {10 1 0}

Mohs Hardness

6-75.5-6

2 10

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Chemical Composition

Nephrite: Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂ Jadeite: NaAlSi₂O₆

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

Jade and Afghanite Chemical Formula

While comparing Jade 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 Jade and Afghanite chemical formula.

Chemical formula of Jade- Nephrite: Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂ Jadeite: NaAlSi₂O₆
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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Jade and Afghanite Specific Gravity

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