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Chalcedony
Chalcedony

Augelite
Augelite



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Chalcedony
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Augelite

Chalcedony and Augelite Physical Properties

Physical Properties

Tenacity

-
-

Solubility

Soluble
-

Durability

-
-

Specific Gravity

2.55-2.702.70-2.75
1 7.18
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Fracture

Uneven, Splintery, Conchoidal
Conchoidal

Cleavage

Absent
From the Greek for luster, for its pearly luster on the cleavage.

Mohs Hardness

6.5-74.5-5
2 10
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Chemical Composition

SiO2
Al 2(PO 4)(OH) 3Michael O’Donoghue , Gems, Sixth Edition (2006)

Chalcedony and Augelite Chemical Formula

While comparing Chalcedony and Augelite 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 Augelite chemical formula.

  • Chemical formula of Chalcedony- SiO2
  • Chemical formula of Augelite- Al 2(PO 4)(OH) 3Michael O’Donoghue , Gems, Sixth Edition (2006)

Chalcedony and Augelite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Chalcedony and Augelite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chalcedony and Augelite Optical Properties during the identification of gemstone. Specific gravity of Chalcedony is 2.70-2.75 whereas that of Augelite is 2.70-2.75.