Sapphire and Afghanite Physical Properties

Sapphire

Afghanite

Afghanite and Sapphire Physical Properties

Physical Properties

Tenacity

Not Available

Solubility

insoluble

Not Available

Durability

Not Available

Specific Gravity

3.95-4.03

2.55-2.65

Fracture

Uneven, Uneven, Gems, Sixth Edition (2006)

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

Cleavage

None, but may exhibit parting

Perfect {10 1 0}

Mohs Hardness

5.5-6

Chemical Composition

Al ₂ O ₃

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

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Sapphire and Afghanite Chemical Formula

While comparing Sapphire 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 Sapphire and Afghanite chemical formula.

Chemical formula of Sapphire- Al ₂ O ₃
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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Sapphire and Afghanite Specific Gravity

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