Turquoise and Poudretteite Physical Properties

Turquoise

Poudretteite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.30-2.902.51-2.53

1 7.18

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle

Conchoidal, Splintery

1.6 Cleavage

Good to perfect_usually N/A

None

1.7 Mohs Hardness

5-65

2 10

1.8 Chemical Composition

CuAl₆(PO₄)₄(OH)₈ • 4H₂O

KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)

Turquoise and Poudretteite Chemical Formula

While comparing Turquoise and Poudretteite 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 Poudretteite chemical formula.

Chemical formula of Turquoise- CuAl₆(PO₄)₄(OH)₈ • 4H₂O
Chemical formula of Poudretteite- KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)

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Turquoise and Poudretteite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Turquoise and Poudretteite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Turquoise and Poudretteite Optical Properties during the identification of gemstone. Specific gravity of Turquoise is 2.51-2.53 whereas that of Poudretteite is 2.51-2.53.