Topaz and Pyrite Physical Properties

Topaz

Pyrite

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Physical Properties

Tenacity

Brittle

Solubility

insoluble in water

Durability

Specific Gravity

3.49-3.575.00-5.20

1 7.18

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Fracture

Subconchoidal, Uneven, Conchoidal

Uneven, Conchoidal, ConchoidalWalter Schumann

Cleavage

[001] Perfect

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

Mohs Hardness

86-6.5

2 10

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Chemical Composition

Al₂SiO₄(F,OH)₂

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

Topaz and Pyrite Chemical Formula

While comparing Topaz 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 Topaz and Pyrite chemical formula.

Chemical formula of Topaz- Al₂SiO₄(F,OH)₂
Chemical formula of Pyrite- FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Gems for Sagittarius

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Topaz Vs Quartz Smoky

Topaz and Pyrite Specific Gravity

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