Poudretteite and Calcite Physical Properties

Poudretteite

Calcite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.51-2.532.67-2.73

1 7.18

1.5 Fracture

Conchoidal, Splintery

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

None

Perfect on [10 1 1] three directions with angle of 74° 55

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

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

CaCO 3Ulrich Henn and Claudio C.

Poudretteite and Calcite Chemical Formula

While comparing Poudretteite and Calcite 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 Poudretteite and Calcite chemical formula.

Chemical formula of Poudretteite- KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.

Compare Violet Gemstones

Poudretteite Vs Rubellite

Poudretteite Vs Sapphire

Poudretteite Vs Rutilated Quartz

Poudretteite and Calcite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Poudretteite and Calcite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Poudretteite and Calcite Optical Properties during the identification of gemstone. Specific gravity of Poudretteite is 2.67-2.73 whereas that of Calcite is 2.67-2.73.