Pollucite and Turquoise Physical Properties

Pollucite

Turquoise

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Physical Properties

Tenacity

Brittle

Solubility

Readily soluble in HF

Soluble

Durability

Specific Gravity

2.86-2.942.30-2.90

1 7.18

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Fracture

Conchoidal, Uneven

Conchoidal

Cleavage

None observed

Good to perfect_usually N/A

Mohs Hardness

6.5-75-6

2 10

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Chemical Composition

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

CuAl₆(PO₄)₄(OH)₈ • 4H₂O

Pollucite and Turquoise Chemical Formula

While comparing Pollucite and Turquoise 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 Pollucite and Turquoise chemical formula.

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

Compare White Gemstones

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Pollucite Vs Witherite

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Pollucite and Turquoise Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pollucite and Turquoise Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pollucite and Turquoise Optical Properties during the identification of gemstone. Specific gravity of Pollucite is 2.30-2.90 whereas that of Turquoise is 2.30-2.90.