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Lapis lazuli
Lapis lazuli

Labradorite
Labradorite



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Lapis lazuli
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Labradorite

Lapis lazuli and Labradorite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
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2.50-3.00
Uneven-Conchoidal, ConchoidalWalter Schumann
3,6
5.5
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
 
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2.69-2.72
Uneven, Conchoidal
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}
6-6.5
(Na,Ca)1-2Si3-2O8

Lapis lazuli and Labradorite Chemical Formula

While comparing Lapis lazuli 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 Lapis lazuli and Labradorite chemical formula.

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Lapis lazuli and Labradorite Specific Gravity

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