Emerald and Augelite Physical Properties

Emerald

Augelite

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Physical Properties

Tenacity

Solubility

Durability

Hard

Specific Gravity

2.67-2.782.70-2.75

1 7.18

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Fracture

Uneven, ConchoidalWalter Schumann

Conchoidal

Cleavage

Imperfect on the [0001]

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

Mohs Hardness

7.5-84.5-5

2 10

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Chemical Composition

Be₃Al₂SiO₆

Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)

Emerald and Augelite Chemical Formula

While comparing Emerald 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 Emerald and Augelite chemical formula.

Chemical formula of Emerald- Be₃Al₂SiO₆
Chemical formula of Augelite- Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)

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Emerald and Augelite Specific Gravity

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