Sillimanite and Cuprite Physical Properties

Sillimanite

Cuprite

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1 Physical Properties

1.1 Tenacity

Tough

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.265.85-6.15

1 7.18

1.5 Fracture

Splintery

Conchoidal, Metallic, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

{010} perfect

Fair in four directions forming octahedrons

1.7 Mohs Hardness

6-7.53.5-4

2 10

1.8 Chemical Composition

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Sillimanite and Cuprite Chemical Formula

While comparing Sillimanite 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 Sillimanite and Cuprite chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Cuprite- Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Sillimanite and Cuprite Specific Gravity

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