Labradorite and Dumortierite Physical Properties

Labradorite

Dumortierite

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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

2.69-2.723.26-3.41

1 7.18

1.5 Fracture

Uneven, Conchoidal, Gems, Sixth Edition (2006)

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

1.6 Cleavage

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

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

1.7 Mohs Hardness

6-6.57-8.5

2 10

1.8 Chemical Composition

(Na,Ca)_1-2Si_3-2O₈

AlAl₆O₃BSi₃O₁₈

Labradorite and Dumortierite Chemical Formula

While comparing Labradorite and Dumortierite 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 Dumortierite chemical formula.

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

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Labradorite and Dumortierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Labradorite and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Labradorite and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Labradorite is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.