Kornerupine and Petalite Physical Properties

Kornerupine

Petalite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

3.25-3.45

Conchoidal, Uneven

Good on {110}

6.5

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

Brittle

insoluble

2.40

Subconchoidal, ConchoidalWalter Schumann, Conchoidal

Perfect on {001}, poor on {201} with 38.5° angle between the two

6-6.5

LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Kornerupine and Petalite Chemical Formula

While comparing Kornerupine and Petalite 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 Petalite chemical formula.

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Kornerupine and Petalite Specific Gravity

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