Pyrite and Iolite Physical Properties

Pyrite

Iolite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

insoluble in water

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

5.00-5.202.6-2.7

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

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

3,1

1.7 Mohs Hardness

6-6.57-7.5

2 10

1.8 Chemical Composition

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

Mg₂Al₄Si₅O₁₈

Pyrite and Iolite Chemical Formula

While comparing Pyrite and Iolite 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 Iolite chemical formula.

Chemical formula of Pyrite- FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈

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Pyrite and Iolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrite and Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrite and Iolite Optical Properties during the identification of gemstone. Specific gravity of Pyrite is 2.6-2.7 whereas that of Iolite is 2.6-2.7.