Lazurite and Hardystonite Physical Properties

Lazurite

Hardystonite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.753.396-3.443

1 7.18

1.5 Fracture

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

Brittle, Metallic

1.6 Cleavage

Imperfect on {110}

[001] good, [100] and [110] fair

1.7 Mohs Hardness

5.53-4

2 10

1.8 Chemical Composition

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

Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)

Lazurite and Hardystonite Chemical Formula

While comparing Lazurite and Hardystonite 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 Hardystonite chemical formula.

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

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Lazurite and Hardystonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lazurite and Hardystonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazurite and Hardystonite Optical Properties during the identification of gemstone. Specific gravity of Lazurite is 3.396-3.443 whereas that of Hardystonite is 3.396-3.443.