Povondraite and Crystal Opal Physical Properties

Povondraite

Crystal Opal

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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

3.261.97-2.22

1 7.18

1.5 Fracture

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

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

None

Not Available

1.7 Mohs Hardness

Not Available5.5-6.5

2 10

1.8 Chemical Composition

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

SiO 2 + H 2OUlrich Henn and Claudio C.

Povondraite and Crystal Opal Chemical Formula

While comparing Povondraite and Crystal Opal 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 Crystal Opal 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 Crystal Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

Compare Brown Gemstones

Povondraite Vs Staurolite

Povondraite Vs Smoky Quartz

Povondraite Vs Sonolite

Povondraite and Crystal Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Povondraite and Crystal Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Povondraite and Crystal Opal Optical Properties during the identification of gemstone. Specific gravity of Povondraite is 1.97-2.22 whereas that of Crystal Opal is 1.97-2.22.