Turquoise and Pollucite Physical Properties

Turquoise

Pollucite

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Physical Properties

Tenacity

Brittle

Solubility

Soluble

Readily soluble in HF

Durability

Specific Gravity

2.30-2.902.86-2.94

1 7.18

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Fracture

Conchoidal

Conchoidal, Uneven

Cleavage

Good to perfect_usually N/A

None observed

Mohs Hardness

5-66.5-7

2 10

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Chemical Composition

CuAl₆(PO₄)₄(OH)₈ • 4H₂O

(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

Turquoise and Pollucite Chemical Formula

While comparing Turquoise and Pollucite 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 Pollucite chemical formula.

Chemical formula of Turquoise- CuAl₆(PO₄)₄(OH)₈ • 4H₂O
Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

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Turquoise and Pollucite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Turquoise and Pollucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Turquoise and Pollucite Optical Properties during the identification of gemstone. Specific gravity of Turquoise is 2.86-2.94 whereas that of Pollucite is 2.86-2.94.