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Pyrope
Pyrope

Chalcedony
Chalcedony



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Pyrope
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Chalcedony

Pyrope and Chalcedony Physical Properties

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Physical Properties

Tenacity

-
-

Solubility

insoluble in water
Soluble

Durability

-
-

Specific Gravity

3.62-3.872.55-2.70
1 7.18
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Fracture

Conchoidal
Uneven, Splintery, Conchoidal

Cleavage

None
Absent

Mohs Hardness

7-7.56.5-7
2 10
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Chemical Composition

Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
SiO2

Pyrope and Chalcedony Chemical Formula

While comparing Pyrope and Chalcedony 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 Pyrope and Chalcedony chemical formula.

  • Chemical formula of Pyrope- Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
  • Chemical formula of Chalcedony- SiO2

Pyrope and Chalcedony Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrope and Chalcedony Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrope and Chalcedony Optical Properties during the identification of gemstone. Specific gravity of Pyrope is 2.55-2.70 whereas that of Chalcedony is 2.55-2.70.