Alexandrite and Kornerupine Physical Properties

Alexandrite

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

3.69-3.813.25-3.45

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

1,1 ; 3,2.

Good on {110}

1.7 Mohs Hardness

8.56.5

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

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

Alexandrite and Kornerupine Chemical Formula

While comparing Alexandrite 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 Alexandrite and Kornerupine chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
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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Alexandrite Vs Gahnospinel

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Alexandrite Vs Citrine

Alexandrite and Kornerupine Specific Gravity

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