Kyanite and Atacamite Physical Properties

Kyanite

Atacamite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.53-3.653.745-3.776

1 7.18

1.5 Fracture

Splintery, Brittle, Metallic

Conchoidal, Conchoidal, Brittle

1.6 Cleavage

[100] perfect [010] imperfect with 79° angle between

Perfect on {010}, fair on {101}

1.7 Mohs Hardness

4-73-3.5

2 10

1.8 Chemical Composition

Not Available

Cu2Cl(OH)3

Kyanite and Atacamite Chemical Formula

While comparing Kyanite and Atacamite 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 Kyanite and Atacamite chemical formula.

Chemical formula of Atacamite- Cu2Cl(OH)3

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Kyanite and Atacamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Atacamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Atacamite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 3.745-3.776 whereas that of Atacamite is 3.745-3.776.