Povondraite and Onyx Physical Properties

Povondraite

Onyx

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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

3.26

2.55-2.70

1.5 Fracture

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

Not Available

1.6 Cleavage

None

Indiscernible

1.7 Mohs Hardness

Not Available

6.5-7

1.8 Chemical Composition

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

SiO₂

Povondraite and Onyx Chemical Formula

While comparing Povondraite and Onyx 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 Onyx 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 Onyx- SiO₂

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Povondraite and Onyx Specific Gravity

Another important criteria for qualitative analysis of gemstones is Povondraite and Onyx Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Povondraite and Onyx Optical Properties during the identification of gemstone. Specific gravity of Povondraite is 2.55-2.70 whereas that of Onyx is 2.55-2.70.