Afghanite and Labradorite Physical Properties

Afghanite

Labradorite

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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

2.69-2.72

1.5 Fracture

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

Uneven, Conchoidal, Gems, Sixth Edition (2006)

1.6 Cleavage

Perfect {10 1 0}

Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}

1.7 Mohs Hardness

5.5-6

6-6.5

1.8 Chemical Composition

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

(Na,Ca)_1-2Si_3-2O₈

Afghanite and Labradorite Chemical Formula

While comparing Afghanite and Labradorite 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 Labradorite 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 Labradorite- (Na,Ca)_1-2Si_3-2O₈

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Afghanite and Labradorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Afghanite and Labradorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Afghanite and Labradorite Optical Properties during the identification of gemstone. Specific gravity of Afghanite is 2.69-2.72 whereas that of Labradorite is 2.69-2.72.