Star Sapphire and Turquoise Physical Properties

Star Sapphire

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

3.90-4.05

2.30-2.90

1.5 Fracture

Not Available

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

Not Available

Good to perfect_usually N/A

1.7 Mohs Hardness

Not Available

5-6

1.8 Chemical Composition

Al 2O 3Ulrich Henn and Claudio C.

CuAl₆(PO₄)₄(OH)₈ • 4H₂O

Star Sapphire and Turquoise Chemical Formula

While comparing Star Sapphire 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 Star Sapphire and Turquoise chemical formula.

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

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Star Sapphire and Turquoise Specific Gravity

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