Labradorite and Kyanite Physical Properties

Labradorite

Kyanite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

2.69-2.723.53-3.65

1 7.18

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Fracture

Uneven, Conchoidal

Splintery

Cleavage

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

[100] perfect [010] imperfect with 79° angle between

Mohs Hardness

6-6.54-7

2 10

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Chemical Composition

(Na,Ca)_1-2Si_3-2O₈

Al2SiO5

Labradorite and Kyanite Chemical Formula

While comparing Labradorite and Kyanite 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 Labradorite and Kyanite chemical formula.

Chemical formula of Labradorite- (Na,Ca)_1-2Si_3-2O₈
Chemical formula of Kyanite- Al2SiO5

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Labradorite and Kyanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Labradorite and Kyanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Labradorite and Kyanite Optical Properties during the identification of gemstone. Specific gravity of Labradorite is 3.53-3.65 whereas that of Kyanite is 3.53-3.65.