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Augelite
Augelite

Sellaite
Sellaite



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Augelite
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Sellaite

Augelite and Sellaite Physical Properties

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Physical Properties

Tenacity

-
Brittle

Solubility

-
-

Durability

-
-

Specific Gravity

2.70-2.753.14-3.16
1 7.18
👆🏻

Fracture

Conchoidal
Conchoidal

Cleavage

From the Greek for luster, for its pearly luster on the cleavage.
Perfect on {010} and {110}

Mohs Hardness

4.5-55-5.5
2 10
👆🏻

Chemical Composition

Al 2(PO 4)(OH) 3Michael O’Donoghue , Gems, Sixth Edition (2006)
MgF 2Ulrich Henn and Claudio C.

Augelite and Sellaite Chemical Formula

While comparing Augelite and Sellaite 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 Augelite and Sellaite chemical formula.

  • Chemical formula of Augelite- Al 2(PO 4)(OH) 3Michael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.

Augelite and Sellaite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Augelite and Sellaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Augelite and Sellaite Optical Properties during the identification of gemstone. Specific gravity of Augelite is 3.14-3.16 whereas that of Sellaite is 3.14-3.16.