Cordierite and Star Sapphire Physical Properties

Cordierite

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

2.57-2.663.90-4.05

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Not Available

1.6 Cleavage

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

Not Available

1.7 Mohs Hardness

7-7.5Not Available

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

Al 2O 3Ulrich Henn and Claudio C.

Cordierite and Star Sapphire Chemical Formula

While comparing Cordierite 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 Cordierite and Star Sapphire chemical formula.

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

Compare Blue Gemstones

Cordierite Vs Riebeckite

Cordierite Vs Rosasite

Cordierite Vs Plumbogummite

Cordierite and Star Sapphire Specific Gravity

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