Pyrite and Spinel Physical Properties

Pyrite

Spinel

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

insoluble in water

none

1.3 Durability

Not Available

1.4 Specific Gravity

5.00-5.203.64-3.66

1 7.18

1.5 Fracture

Uneven, Conchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

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

None, but may exhibit slight parting

1.7 Mohs Hardness

6-6.58

2 10

1.8 Chemical Composition

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

MgAl₂O₄

Pyrite and Spinel Chemical Formula

While comparing Pyrite and Spinel 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 Spinel chemical formula.

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

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Pyrite and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrite and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrite and Spinel Optical Properties during the identification of gemstone. Specific gravity of Pyrite is 3.64-3.66 whereas that of Spinel is 3.64-3.66.