Riebeckite and Augelite Physical Properties

Riebeckite

Augelite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.28-3.442.70-2.75

1 7.18

1.5 Fracture

Uneven, Splintery, Brittle

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

1.6 Cleavage

Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}

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

1.7 Mohs Hardness

5.0-6.04.5-5

2 10

1.8 Chemical Composition

Not Available

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

Riebeckite and Augelite Chemical Formula

While comparing Riebeckite 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 Riebeckite and Augelite chemical formula.

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

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Riebeckite and Augelite Specific Gravity

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