Thulite and Labradorite Physical Properties

Thulite

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

3.1

2.69-2.72

1.5 Fracture

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

Uneven, Conchoidal, Gems, Sixth Edition (2006)

1.6 Cleavage

Perfect {010} imperfect {100}

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

1.7 Mohs Hardness

6-7

6-6.5

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

(Na,Ca)_1-2Si_3-2O₈

Thulite and Labradorite Chemical Formula

While comparing Thulite 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 Thulite and Labradorite chemical formula.

Chemical formula of Thulite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Labradorite- (Na,Ca)_1-2Si_3-2O₈

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Thulite and Labradorite Specific Gravity

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