Sapphire and Star Sapphire Physical Properties

Sapphire

Star Sapphire

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.95-4.033.90-4.05

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Sixth Edition (2006)

Not Available

1.6 Cleavage

None, but may exhibit parting

Not Available

1.7 Mohs Hardness

9Not Available

2 10

1.8 Chemical Composition

Al ₂ O ₃

Al 2O 3Ulrich Henn and Claudio C.

Sapphire and Star Sapphire Chemical Formula

While comparing Sapphire 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 Sapphire and Star Sapphire chemical formula.

Chemical formula of Sapphire- Al ₂ O ₃
Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.

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Sapphire and Star Sapphire Specific Gravity

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