Kornerupine and Opal Physical Properties

Kornerupine

Opal

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1 Physical Properties

1.1 Tenacity

Not Available

BrittleWalter Schumann

1.2 Solubility

Not Available

hot salt water

1.3 Durability

Not Available

1.4 Specific Gravity

3.25-3.45

1.98-2.25

1.5 Fracture

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

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle

1.6 Cleavage

Good on {110}

None

1.7 Mohs Hardness

6.5

5-6.5

1.8 Chemical Composition

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

SiO₂ · nH₂O

Kornerupine and Opal Chemical Formula

While comparing Kornerupine and Opal 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 Opal 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 Opal- SiO₂ · nH₂O

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Kornerupine and Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kornerupine and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kornerupine and Opal Optical Properties during the identification of gemstone. Specific gravity of Kornerupine is 1.98-2.25 whereas that of Opal is 1.98-2.25.