Lazurite and Sapphire Physical Properties

Lazurite

Sapphire

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.75

3.95-4.03

1.5 Fracture

Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

Imperfect on {110}

None, but may exhibit parting

1.7 Mohs Hardness

5.5

1.8 Chemical Composition

(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.

Al ₂ O ₃

Lazurite and Sapphire Chemical Formula

While comparing Lazurite and Sapphire 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 Lazurite and Sapphire chemical formula.

Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Chemical formula of Sapphire- Al ₂ O ₃

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Lazurite and Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lazurite and Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazurite and Sapphire Optical Properties during the identification of gemstone. Specific gravity of Lazurite is 3.95-4.03 whereas that of Sapphire is 3.95-4.03.