Alexandrite and Labradorite Physical Properties

Alexandrite

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

3.69-3.81

2.69-2.72

1.5 Fracture

Not Available

Uneven, Conchoidal, Gems, Sixth Edition (2006)

1.6 Cleavage

1,1 ; 3,2.

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

1.7 Mohs Hardness

8.5

6-6.5

1.8 Chemical Composition

BeAl ₂ O ₄

(Na,Ca)_1-2Si_3-2O₈

Alexandrite and Labradorite Chemical Formula

While comparing Alexandrite 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 Alexandrite and Labradorite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Labradorite- (Na,Ca)_1-2Si_3-2O₈

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Alexandrite and Labradorite Specific Gravity

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