Sillimanite and Pyrite Physical Properties

Sillimanite

Pyrite

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1 Physical Properties

1.1 Tenacity

Tough

Brittle

1.2 Solubility

Not Available

insoluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.265.00-5.20

1 7.18

1.5 Fracture

Splintery

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

1.6 Cleavage

{010} perfect

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

1.7 Mohs Hardness

6-7.56-6.5

2 10

1.8 Chemical Composition

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Sillimanite and Pyrite Chemical Formula

While comparing Sillimanite 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 Sillimanite and Pyrite chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Pyrite- FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Sillimanite and Pyrite Specific Gravity

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