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Boracite
Boracite

Pyrite
Pyrite



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Boracite
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Pyrite

Boracite and Pyrite Physical Properties

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Physical Properties

Tenacity

Brittle
Brittle

Solubility

Soluble
insoluble in water

Durability

-
-

Specific Gravity

2.95-2.965.00-5.20
1 7.18
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Fracture

Conchoidal
Uneven, Conchoidal, ConchoidalWalter Schumann

Cleavage

None
Indistinct on {001}; partings on {011} and {111}

Mohs Hardness

7-7.56-6.5
2 10
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Chemical Composition

Mg 3B 7O 13ClMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references
FeS 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Boracite and Pyrite Chemical Formula

While comparing Boracite 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 Boracite and Pyrite chemical formula.

  • Chemical formula of Boracite- Mg 3B 7O 13ClMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Pyrite- FeS 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Boracite and Pyrite Specific Gravity

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