Helenite and Augelite Physical Properties
Tenacity
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Solubility
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Durability
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Specific Gravity
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2.70-2.75
Fracture
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ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
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From the Greek for luster, for its pearly luster on the cleavage.
Mohs Hardness
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4.5-5
Chemical Composition
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Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)
Helenite and Augelite Chemical Formula
While comparing Helenite 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 Helenite and Augelite chemical formula.
>- Chemical formula of Augelite- Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)
Helenite and Augelite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Helenite and Augelite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Helenite and Augelite Optical Properties during the identification of gemstone. Specific gravity of Helenite is 2.70-2.75 whereas that of Augelite is 2.70-2.75.