Labradorite and Lapis lazuli Physical Properties

Labradorite

Lapis lazuli

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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

2.69-2.722.50-3.00

1 7.18

1.5 Fracture

Uneven, Conchoidal, Gems, Sixth Edition (2006)

Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

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

3,6

1.7 Mohs Hardness

6-6.55.5

2 10

1.8 Chemical Composition

(Na,Ca)_1-2Si_3-2O₈

The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)₈Al₆Si₆O₂₄(S,SO)₄

Labradorite and Lapis lazuli Chemical Formula

While comparing Labradorite and Lapis lazuli 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 Lapis lazuli chemical formula.

Chemical formula of Labradorite- (Na,Ca)_1-2Si_3-2O₈
Chemical formula of Lapis lazuli- The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)₈Al₆Si₆O₂₄(S,SO)₄

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Labradorite and Lapis lazuli Specific Gravity

Another important criteria for qualitative analysis of gemstones is Labradorite and Lapis lazuli Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Labradorite and Lapis lazuli Optical Properties during the identification of gemstone. Specific gravity of Labradorite is 2.50-3.00 whereas that of Lapis lazuli is 2.50-3.00.