Vivianite and Augelite Physical Properties

Vivianite

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

2.64-2.702.70-2.75

1 7.18

1.5 Fracture

(e.g. graphite).

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

1.6 Cleavage

{010} Perfect

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

1.7 Mohs Hardness

Not Available4.5-5

2 10

1.8 Chemical Composition

Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

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

Vivianite and Augelite Chemical Formula

While comparing Vivianite 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 Vivianite and Augelite chemical formula.

Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Chemical formula of Augelite- Al 2(PO 4)(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)

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Vivianite and Augelite Specific Gravity

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