Ettringite and Bornite Physical Properties

Ettringite

Bornite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Partially soluble in water

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.775.06-5.08

1 7.18

1.5 Fracture

Not Available

Uneven, Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

Perfect on {10 1 0}

Poor on [111].

1.7 Mohs Hardness

2-2.53-3.25

2 10

1.8 Chemical Composition

Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Cu5FeS4

Ettringite and Bornite Chemical Formula

While comparing Ettringite 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 Ettringite and Bornite chemical formula.

Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Bornite- Cu5FeS4

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Ettringite and Bornite Specific Gravity

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