Topaz and Turquoise Physical Properties

Topaz

Turquoise

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.49-3.57

2.30-2.90

1.5 Fracture

Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

[001] Perfect

Good to perfect_usually N/A

1.7 Mohs Hardness

5-6

1.8 Chemical Composition

Al₂SiO₄(F,OH)₂

CuAl₆(PO₄)₄(OH)₈ • 4H₂O

Topaz and Turquoise Chemical Formula

While comparing Topaz 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 Topaz and Turquoise chemical formula.

Chemical formula of Topaz- Al₂SiO₄(F,OH)₂
Chemical formula of Turquoise- CuAl₆(PO₄)₄(OH)₈ • 4H₂O

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Topaz and Turquoise Specific Gravity

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