Dumortierite and Kornerupine Physical Properties

Dumortierite

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

3.26-3.413.25-3.45

1 7.18

1.5 Fracture

Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

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

1.6 Cleavage

Distinct on {100}, poor on {110}; parting on {001}

Good on {110}

1.7 Mohs Hardness

7-8.56.5

2 10

1.8 Chemical Composition

AlAl₆O₃BSi₃O₁₈

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

Dumortierite and Kornerupine Chemical Formula

While comparing Dumortierite 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 Dumortierite and Kornerupine chemical formula.

Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈
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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Dumortierite and Kornerupine Specific Gravity

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