Lazurite and Rosasite Physical Properties

Lazurite

Rosasite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

Effervesces in cold

1.3 Durability

Not Available

1.4 Specific Gravity

2.754-4.2

1 7.18

1.5 Fracture

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

Splintery

1.6 Cleavage

Imperfect on {110}

Perfect on {100} and {010}

1.7 Mohs Hardness

5.54

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 Rosasite Chemical Formula

While comparing Lazurite and Rosasite 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 Rosasite 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 Rosasite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lazurite and Rosasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazurite and Rosasite Optical Properties during the identification of gemstone. Specific gravity of Lazurite is 4-4.2 whereas that of Rosasite is 4-4.2.