Almandine and Labradorite Physical Properties

Almandine

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

3.95-4.30

2.69-2.72

1.5 Fracture

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

Uneven, Conchoidal, Gems, Sixth Edition (2006)

1.6 Cleavage

none

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

1.7 Mohs Hardness

7-7.5

6-6.5

1.8 Chemical Composition

Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

(Na,Ca)_1-2Si_3-2O₈

Almandine and Labradorite Chemical Formula

While comparing Almandine 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 Almandine and Labradorite chemical formula.

Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Labradorite- (Na,Ca)_1-2Si_3-2O₈

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Almandine and Labradorite Specific Gravity

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