Kornerupine and Erythrite Physical Properties

Kornerupine

Erythrite

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1 Physical Properties

1.1 Tenacity

Not Available

Sectile

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.25-3.453.06

1 7.18

1.5 Fracture

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

Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).

1.6 Cleavage

Good on {110}

Perfect on {010}; poor on {100} and { 1 02}.

1.7 Mohs Hardness

6.5Not Available

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

Co3(AsO4)2•8(H2O)

Kornerupine and Erythrite Chemical Formula

While comparing Kornerupine and Erythrite 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 Erythrite 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 Erythrite- Co3(AsO4)2•8(H2O)

Compare Green Gemstones

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Kornerupine and Erythrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kornerupine and Erythrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kornerupine and Erythrite Optical Properties during the identification of gemstone. Specific gravity of Kornerupine is 3.06 whereas that of Erythrite is 3.06.