Lazurite and Dallasite Physical Properties

Lazurite

Dallasite

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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

2.752.58-2.91

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

Imperfect on {110}

Not Available

1.7 Mohs Hardness

5.56.5-7

2 10

1.8 Chemical Composition

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

Not Available

Lazurite and Dallasite Chemical Formula

While comparing Lazurite and Dallasite 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 Dallasite chemical formula.

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

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Lazurite and Dallasite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lazurite and Dallasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazurite and Dallasite Optical Properties during the identification of gemstone. Specific gravity of Lazurite is 2.58-2.91 whereas that of Dallasite is 2.58-2.91.