Lazurite and Calcite Physical Properties

Lazurite

Calcite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.75

2.67-2.73

1.5 Fracture

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

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

Imperfect on {110}

Perfect on [10 1 1] three directions with angle of 74° 55

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.

CaCO 3Ulrich Henn and Claudio C.

Lazurite and Calcite Chemical Formula

While comparing Lazurite and Calcite 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 Calcite chemical formula.

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

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Lazurite and Calcite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lazurite and Calcite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazurite and Calcite Optical Properties during the identification of gemstone. Specific gravity of Lazurite is 2.67-2.73 whereas that of Calcite is 2.67-2.73.