Polyhalite and Turquoise Physical Properties

Polyhalite

Turquoise

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.782.30-2.90

1 7.18

1.5 Fracture

Conchoidal, Brittle

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

Perfect on {10 1 }; parting on {010}

Good to perfect_usually N/A

1.7 Mohs Hardness

3.55-6

2 10

1.8 Chemical Composition

Not Available

CuAl₆(PO₄)₄(OH)₈ • 4H₂O

Polyhalite and Turquoise Chemical Formula

While comparing Polyhalite 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 Polyhalite and Turquoise chemical formula.

Chemical formula of Turquoise- CuAl₆(PO₄)₄(OH)₈ • 4H₂O

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Polyhalite Vs Jacinth

Polyhalite and Turquoise Specific Gravity

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