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Chalcedony
Chalcedony

Aragonite
Aragonite



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Chalcedony
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Aragonite

Chalcedony and Aragonite Physical Properties

Physical Properties

Tenacity

-
Brittle

Solubility

Soluble
Dilute acid

Durability

-
-

Specific Gravity

2.55-2.702.93-2.96
1 7.18
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Fracture

Uneven, Splintery, Conchoidal
Subconchoidal, Conchoidal

Cleavage

Absent
Distinct on {010}, imperfect {110} and {011}

Mohs Hardness

6.5-73.5-4
2 10
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Chemical Composition

SiO2
CaCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Chalcedony and Aragonite Chemical Formula

While comparing Chalcedony and Aragonite 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 Chalcedony and Aragonite chemical formula.

  • Chemical formula of Chalcedony- SiO2
  • Chemical formula of Aragonite- CaCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Chalcedony and Aragonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Chalcedony and Aragonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chalcedony and Aragonite Optical Properties during the identification of gemstone. Specific gravity of Chalcedony is 2.93-2.96 whereas that of Aragonite is 2.93-2.96.