Spinel and Augelite Physical Properties

Spinel

Augelite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

none

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.64-3.662.70-2.75

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

None, but may exhibit slight parting

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

1.7 Mohs Hardness

84.5-5

2 10

1.8 Chemical Composition

MgAl₂O₄

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

Spinel and Augelite Chemical Formula

While comparing Spinel 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 Spinel and Augelite chemical formula.

Chemical formula of Spinel- MgAl₂O₄
Chemical formula of Augelite- Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)

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Spinel and Augelite Specific Gravity

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