Star Sapphire and Kornerupine Physical Properties

Star Sapphire

Kornerupine

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.90-4.053.25-3.45

1 7.18

1.5 Fracture

Not Available

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Uneven

1.6 Cleavage

Not Available

Good on {110}

1.7 Mohs Hardness

Not Available6.5

2 10

1.8 Chemical Composition

Al 2O 3Ulrich Henn and Claudio C.

Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Star Sapphire and Kornerupine Chemical Formula

While comparing Star Sapphire and Kornerupine 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 Kornerupine chemical formula.

Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.
Chemical formula of Kornerupine- Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references

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Star Sapphire Vs Tourmaline

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Star Sapphire and Kornerupine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Star Sapphire and Kornerupine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Star Sapphire and Kornerupine Optical Properties during the identification of gemstone. Specific gravity of Star Sapphire is 3.25-3.45 whereas that of Kornerupine is 3.25-3.45.