Pyrite and Annabergite Physical Properties

Pyrite

Annabergite

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Physical Properties

Tenacity

Brittle

Sectile

Solubility

insoluble in water

Durability

Specific Gravity

5.00-5.203.07

1 7.18

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Fracture

Uneven, Conchoidal, ConchoidalWalter Schumann

Cleavage

Indistinct on {001}; partings on {011} and {111}

Perfect on {010}, indistinct on {100} and {102}

Mohs Hardness

6-6.52

2 10

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Chemical Composition

FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Ni3(AsO4)2•8(H2O)

Pyrite and Annabergite Chemical Formula

While comparing Pyrite and Annabergite 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 Pyrite and Annabergite chemical formula.

Chemical formula of Pyrite- FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Annabergite- Ni3(AsO4)2•8(H2O)

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Pyrite and Annabergite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrite and Annabergite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrite and Annabergite Optical Properties during the identification of gemstone. Specific gravity of Pyrite is 3.07 whereas that of Annabergite is 3.07.