Lazurite and Bertrandite Physical Properties

Lazurite

Bertrandite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.752.59-2.60

1 7.18

1.5 Fracture

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

Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

Imperfect on {110}

{001} Perfect, {110} Distinct, {101} Distinct

1.7 Mohs Hardness

5.56-7

2 10

1.8 Chemical Composition

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

Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

Lazurite and Bertrandite Chemical Formula

While comparing Lazurite and Bertrandite 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 Bertrandite chemical formula.

Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Chemical formula of Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

Compare Blue Gemstones

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Lazurite and Bertrandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lazurite and Bertrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazurite and Bertrandite Optical Properties during the identification of gemstone. Specific gravity of Lazurite is 2.59-2.60 whereas that of Bertrandite is 2.59-2.60.