Alexandrite and Covellite Physical Properties

Alexandrite

Covellite

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1 Physical Properties

1.1 Tenacity

Not Available

Flexible

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.69-3.814.6-4.76

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

1,1 ; 3,2.

Perfect on {0001}

1.7 Mohs Hardness

8.5Not Available

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references

Alexandrite and Covellite Chemical Formula

While comparing Alexandrite and Covellite 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 Covellite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Alexandrite and Covellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Covellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Covellite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 4.6-4.76 whereas that of Covellite is 4.6-4.76.