Turquoise and Star Sapphire Physical Properties

Turquoise

Star Sapphire

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.30-2.903.90-4.05

1 7.18

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle

Not Available

1.6 Cleavage

Good to perfect_usually N/A

Not Available

1.7 Mohs Hardness

5-6Not Available

2 10

1.8 Chemical Composition

CuAl₆(PO₄)₄(OH)₈ • 4H₂O

Al 2O 3Ulrich Henn and Claudio C.

Turquoise and Star Sapphire Chemical Formula

While comparing Turquoise and Star Sapphire 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 Star Sapphire chemical formula.

Chemical formula of Turquoise- CuAl₆(PO₄)₄(OH)₈ • 4H₂O
Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.

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Turquoise and Star Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Turquoise and Star Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Turquoise and Star Sapphire Optical Properties during the identification of gemstone. Specific gravity of Turquoise is 3.90-4.05 whereas that of Star Sapphire is 3.90-4.05.