Alexandrite and Bornite Physical Properties

Alexandrite

Bornite

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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

3.69-3.81

5.06-5.08

1.5 Fracture

Not Available

Uneven, Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

1,1 ; 3,2.

Poor on [111].

1.7 Mohs Hardness

8.5

3-3.25

1.8 Chemical Composition

BeAl ₂ O ₄

Cu5FeS4

Alexandrite and Bornite Chemical Formula

While comparing Alexandrite and Bornite 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 Bornite chemical formula.

Chemical formula of Alexandrite- BeAl ₂ O ₄
Chemical formula of Bornite- Cu5FeS4

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Alexandrite and Bornite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Bornite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Bornite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 5.06-5.08 whereas that of Bornite is 5.06-5.08.