Dumortierite and Labradorite Physical Properties

Dumortierite

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

3.26-3.412.69-2.72

1 7.18

1.5 Fracture

Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

Uneven, Conchoidal, Gems, Sixth Edition (2006)

1.6 Cleavage

Distinct on {100}, poor on {110}; parting on {001}

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

1.7 Mohs Hardness

7-8.56-6.5

2 10

1.8 Chemical Composition

AlAl₆O₃BSi₃O₁₈

(Na,Ca)_1-2Si_3-2O₈

Dumortierite and Labradorite Chemical Formula

While comparing Dumortierite 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 Dumortierite and Labradorite chemical formula.

Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈
Chemical formula of Labradorite- (Na,Ca)_1-2Si_3-2O₈

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Dumortierite and Labradorite Specific Gravity

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