Tourmaline and Povondraite Physical Properties

Tourmaline

Povondraite

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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

2.85-3.353.26

1 7.18

1.5 Fracture

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

Indistinct

None

1.7 Mohs Hardness

7-7.5Not Available

2 10

1.8 Chemical Composition

Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.

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

Tourmaline and Povondraite Chemical Formula

While comparing Tourmaline and Povondraite 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 Tourmaline and Povondraite chemical formula.

Chemical formula of Tourmaline- Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
Chemical formula of Povondraite- NaFe3+3Fe3+6(BO 3) 3Si 6O 18(O,OH) 4Anthony et al , Handbook of Mineralogy (2001)

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Tourmaline and Povondraite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Tourmaline and Povondraite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tourmaline and Povondraite Optical Properties during the identification of gemstone. Specific gravity of Tourmaline is 3.26 whereas that of Povondraite is 3.26.