Augelite and Sillimanite Physical Properties

Augelite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Not Available

Tough

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.70-2.753.20-3.26

1 7.18

1.5 Fracture

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

Splintery

1.6 Cleavage

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

{010} perfect

1.7 Mohs Hardness

4.5-56-7.5

2 10

1.8 Chemical Composition

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

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Augelite and Sillimanite Chemical Formula

While comparing Augelite and Sillimanite 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 Sillimanite chemical formula.

Chemical formula of Augelite- Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Colorless Gems

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Augelite and Sillimanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Augelite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Augelite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Augelite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.