Ruby and Star Sapphire Physical Properties

Ruby

Star Sapphire

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.97-4.053.90-4.05

1 7.18

1.5 Fracture

Conchoidal

Not Available

1.6 Cleavage

No true cleavage

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.

Ruby and Star Sapphire Chemical Formula

While comparing Ruby 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 Ruby and Star Sapphire chemical formula.

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

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Ruby and Star Sapphire Specific Gravity

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