Labradorite and Bertrandite Physical Properties

Labradorite

Bertrandite

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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

2.69-2.722.59-2.60

1 7.18

1.5 Fracture

Uneven, Conchoidal, Gems, Sixth Edition (2006)

Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

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

{001} Perfect, {110} Distinct, {101} Distinct

1.7 Mohs Hardness

6-6.56-7

2 10

1.8 Chemical Composition

(Na,Ca)_1-2Si_3-2O₈

Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

Labradorite and Bertrandite Chemical Formula

While comparing Labradorite and Bertrandite 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 Bertrandite chemical formula.

Chemical formula of Labradorite- (Na,Ca)_1-2Si_3-2O₈
Chemical formula of Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

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Labradorite and Bertrandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Labradorite and Bertrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Labradorite and Bertrandite Optical Properties during the identification of gemstone. Specific gravity of Labradorite is 2.59-2.60 whereas that of Bertrandite is 2.59-2.60.