Alexandrite and Cuprite Physical Properties

Alexandrite

Cuprite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.69-3.815.85-6.15

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

1,1 ; 3,2.

Fair in four directions forming octahedrons

1.7 Mohs Hardness

8.53.5-4

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

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

Alexandrite and Cuprite Chemical Formula

While comparing Alexandrite 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 Alexandrite and Cuprite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Cuprite- Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Alexandrite and Cuprite Specific Gravity

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