Kornerupine and Ruby Physical Properties

Kornerupine

Ruby

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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

3.25-3.45

3.97-4.05

1.5 Fracture

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

Conchoidal

1.6 Cleavage

Good on {110}

No true cleavage

1.7 Mohs Hardness

6.5

1.8 Chemical Composition

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

Al ₂ O ₃

Kornerupine and Ruby Chemical Formula

While comparing Kornerupine and Ruby 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 Kornerupine and Ruby chemical formula.

Chemical formula of Kornerupine- Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Ruby- Al ₂ O ₃

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Kornerupine and Ruby Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kornerupine and Ruby Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kornerupine and Ruby Optical Properties during the identification of gemstone. Specific gravity of Kornerupine is 3.97-4.05 whereas that of Ruby is 3.97-4.05.