Alexandrite and Augelite Physical Properties

Alexandrite

Augelite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.69-3.812.70-2.75

1 7.18

1.5 Fracture

Not Available

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

1,1 ; 3,2.

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

1.7 Mohs Hardness

8.54.5-5

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

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

Alexandrite and Augelite Chemical Formula

While comparing Alexandrite 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 Alexandrite and Augelite chemical formula.

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

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Alexandrite and Augelite Specific Gravity

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