Spinel and Pyrite Physical Properties

Spinel

Pyrite

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Physical Properties

Tenacity

Brittle

Solubility

insoluble in water

Durability

Specific Gravity

3.64-3.665.00-5.20

1 7.18

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Fracture

Conchoidal, Uneven

Uneven, Conchoidal, ConchoidalWalter Schumann

Cleavage

None, but may exhibit slight parting

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

Mohs Hardness

86-6.5

2 10

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Chemical Composition

MgAl₂O₄

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

Spinel and Pyrite Chemical Formula

While comparing Spinel and Pyrite 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 Spinel and Pyrite chemical formula.

Chemical formula of Spinel- MgAl₂O₄
Chemical formula of Pyrite- FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Spinel and Pyrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Spinel and Pyrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Pyrite Optical Properties during the identification of gemstone. Specific gravity of Spinel is 5.00-5.20 whereas that of Pyrite is 5.00-5.20.