Bornite and Black Opal Physical Properties

Bornite

Black Opal

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

5.06-5.08

1.97-2.22

1.5 Fracture

Uneven, Subconchoidal, Conchoidal, Brittle

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Poor on [111].

Not Available

1.7 Mohs Hardness

3-3.25

6-6.5

1.8 Chemical Composition

Cu5FeS4

SiO 2 + H 2OUlrich Henn and Claudio C.

Bornite and Black Opal Chemical Formula

While comparing Bornite and Black Opal 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 Bornite and Black Opal chemical formula.

Chemical formula of Bornite- Cu5FeS4
Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Bornite and Black Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bornite and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bornite and Black Opal Optical Properties during the identification of gemstone. Specific gravity of Bornite is 1.97-2.22 whereas that of Black Opal is 1.97-2.22.