Bornite and Howlite Physical Properties

Bornite

Howlite

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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

2.45-2.58

1.5 Fracture

Uneven, Subconchoidal, Conchoidal, Brittle

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

1.6 Cleavage

Poor on [111].

None

1.7 Mohs Hardness

3-3.25

3-3.5

1.8 Chemical Composition

Cu5FeS4

Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Bornite and Howlite Chemical Formula

While comparing Bornite and Howlite 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 Howlite chemical formula.

Chemical formula of Bornite- Cu5FeS4
Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Bornite and Howlite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bornite and Howlite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bornite and Howlite Optical Properties during the identification of gemstone. Specific gravity of Bornite is 2.45-2.58 whereas that of Howlite is 2.45-2.58.