Riebeckite and Poudretteite Physical Properties

Riebeckite

Poudretteite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.28-3.442.51-2.53

1 7.18

1.5 Fracture

Uneven, Splintery, Brittle

Conchoidal, Splintery

1.6 Cleavage

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

None

1.7 Mohs Hardness

5.0-6.05

2 10

1.8 Chemical Composition

Not Available

KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)

Riebeckite and Poudretteite Chemical Formula

While comparing Riebeckite and Poudretteite 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 Poudretteite chemical formula.

Chemical formula of Poudretteite- KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)

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Riebeckite and Poudretteite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Riebeckite and Poudretteite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Riebeckite and Poudretteite Optical Properties during the identification of gemstone. Specific gravity of Riebeckite is 2.51-2.53 whereas that of Poudretteite is 2.51-2.53.