Star Sapphire and Cordierite Physical Properties

Star Sapphire

Cordierite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.90-4.05

2.57-2.66

1.5 Fracture

Not Available

Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

Not Available

Fair on {100}, poor on {001} and {010}

1.7 Mohs Hardness

Not Available

7-7.5

1.8 Chemical Composition

Al 2O 3Ulrich Henn and Claudio C.

Mg2Al4Si5O18

Star Sapphire and Cordierite Chemical Formula

While comparing Star Sapphire and Cordierite 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 Cordierite chemical formula.

Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.
Chemical formula of Cordierite- Mg2Al4Si5O18

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Star Sapphire and Cordierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Star Sapphire and Cordierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Star Sapphire and Cordierite Optical Properties during the identification of gemstone. Specific gravity of Star Sapphire is 2.57-2.66 whereas that of Cordierite is 2.57-2.66.