Shigaite and Lazurite Physical Properties

Shigaite

Lazurite

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1 Physical Properties

1.1 Tenacity

Moderately ﬂexible

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.322.75

1 7.18

1.5 Fracture

Flexible Flexible fragments.

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

1.6 Cleavage

Perfect on {0001}

Imperfect on {110}

1.7 Mohs Hardness

25.5

2 10

1.8 Chemical Composition

Not Available

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

Shigaite and Lazurite Chemical Formula

While comparing Shigaite and Lazurite 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 Shigaite and Lazurite 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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Shigaite and Lazurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Shigaite and Lazurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Shigaite and Lazurite Optical Properties during the identification of gemstone. Specific gravity of Shigaite is 2.75 whereas that of Lazurite is 2.75.