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Forsterite
Forsterite

Pyrite
Pyrite



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Forsterite
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Pyrite

Forsterite and Pyrite Physical Properties

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Physical Properties

Tenacity

-
Brittle

Solubility

-
insoluble in water

Durability

-
-

Specific Gravity

3.23-3.265.00-5.20
1 7.18
👆🏻

Fracture

Conchoidal
Uneven, Conchoidal, ConchoidalWalter Schumann

Cleavage

Perfect on {010} imperfect on {100}
Indistinct on {001}; partings on {011} and {111}

Mohs Hardness

6.5-76-6.5
2 10
👆🏻

Chemical Composition

Mg 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)
FeS 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Forsterite and Pyrite Chemical Formula

While comparing Forsterite 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 Forsterite and Pyrite chemical formula.

  • Chemical formula of Forsterite- Mg 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Pyrite- FeS 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Forsterite and Pyrite Specific Gravity

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