Povondraite and Calcite Physical Properties

Povondraite

Calcite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.262.67-2.73

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)

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

Not Available3

2 10

1.8 Chemical Composition

NaFe3+3Fe3+6(BO 3) 3Si 6O 18(O,OH) 4Anthony et al , Handbook of Mineralogy (2001)

CaCO 3Ulrich Henn and Claudio C.

Povondraite and Calcite Chemical Formula

While comparing Povondraite 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 Povondraite and Calcite chemical formula.

Chemical formula of Povondraite- NaFe3+3Fe3+6(BO 3) 3Si 6O 18(O,OH) 4Anthony et al , Handbook of Mineralogy (2001)
Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.

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Povondraite and Calcite Specific Gravity

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