Labradorite and Apatite Physical Properties

Labradorite

Apatite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

2.69-2.723.16-3.23

1 7.18

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Fracture

Uneven, Conchoidal

Conchoidal, Uneven, Conchoidal to uneven

Cleavage

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

[0001] indistinct, [1010] indistinct

Mohs Hardness

6-6.55

2 10

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Chemical Composition

(Na,Ca)_1-2Si_3-2O₈

Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

Labradorite and Apatite Chemical Formula

While comparing Labradorite and Apatite 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 Apatite chemical formula.

Chemical formula of Labradorite- (Na,Ca)_1-2Si_3-2O₈
Chemical formula of Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

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Labradorite and Apatite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Labradorite and Apatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Labradorite and Apatite Optical Properties during the identification of gemstone. Specific gravity of Labradorite is 3.16-3.23 whereas that of Apatite is 3.16-3.23.