Kornerupine and Spinel Physical Properties

Kornerupine

Spinel

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

none

1.3 Durability

Not Available

1.4 Specific Gravity

3.25-3.453.64-3.66

1 7.18

1.5 Fracture

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

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Good on {110}

None, but may exhibit slight parting

1.7 Mohs Hardness

6.58

2 10

1.8 Chemical Composition

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

MgAl₂O₄

Kornerupine and Spinel Chemical Formula

While comparing Kornerupine and Spinel 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 Spinel 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 Spinel- MgAl₂O₄

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Kornerupine and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kornerupine and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kornerupine and Spinel Optical Properties during the identification of gemstone. Specific gravity of Kornerupine is 3.64-3.66 whereas that of Spinel is 3.64-3.66.