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Kyanite
Kyanite

Cuprite
Cuprite



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Kyanite
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Cuprite

Kyanite and Cuprite Physical Properties

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Physical Properties

Tenacity

Brittle
Brittle

Solubility

-
-

Durability

-
-

Specific Gravity

3.53-3.655.85-6.15
1 7.18
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Fracture

Splintery
Conchoidal

Cleavage

[100] perfect [010] imperfect with 79° angle between
Fair in four directions forming octahedrons

Mohs Hardness

4-73.5-4
2 10
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Chemical Composition

Al2SiO5
Cu 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Kyanite and Cuprite Chemical Formula

While comparing Kyanite and Cuprite 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 Kyanite and Cuprite chemical formula.

  • Chemical formula of Kyanite- Al2SiO5
  • Chemical formula of Cuprite- Cu 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Kyanite and Cuprite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Cuprite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Cuprite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 5.85-6.15 whereas that of Cuprite is 5.85-6.15.