Sellaite and Star Sapphire Physical Properties

Sellaite

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

3.14-3.16

3.90-4.05

1.5 Fracture

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle

Not Available

1.6 Cleavage

Perfect on {010} and {110}

Not Available

1.7 Mohs Hardness

5-5.5

Not Available

1.8 Chemical Composition

MgF 2Ulrich Henn and Claudio C.

Al 2O 3Ulrich Henn and Claudio C.

Sellaite and Star Sapphire Chemical Formula

While comparing Sellaite 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 Sellaite and Star Sapphire chemical formula.

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

Compare White Gemstones

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Sellaite and Star Sapphire Specific Gravity

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