Turquoise and Sellaite Physical Properties

Turquoise

Sellaite

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Physical Properties

Tenacity

Brittle

Solubility

Soluble

Durability

Specific Gravity

2.30-2.903.14-3.16

1 7.18

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Fracture

Conchoidal

Cleavage

Good to perfect_usually N/A

Perfect on {010} and {110}

Mohs Hardness

5-65-5.5

2 10

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Chemical Composition

CuAl₆(PO₄)₄(OH)₈ • 4H₂O

MgF 2Ulrich Henn and Claudio C.

Turquoise and Sellaite Chemical Formula

While comparing Turquoise and Sellaite 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 Turquoise and Sellaite chemical formula.

Chemical formula of Turquoise- CuAl₆(PO₄)₄(OH)₈ • 4H₂O
Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.

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Turquoise and Sellaite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Turquoise and Sellaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Turquoise and Sellaite Optical Properties during the identification of gemstone. Specific gravity of Turquoise is 3.14-3.16 whereas that of Sellaite is 3.14-3.16.