Papagoite and Black Opal Physical Properties

Papagoite

Black 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

3.251.97-2.22

1 7.18

1.5 Fracture

Brittle, Metallic

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

1.6 Cleavage

Imperfect in one direction

Not Available

1.7 Mohs Hardness

5-5.56-6.5

2 10

1.8 Chemical Composition

CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)

SiO 2 + H 2OUlrich Henn and Claudio C.

Papagoite and Black Opal Chemical Formula

While comparing Papagoite and Black 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 Papagoite and Black Opal chemical formula.

Chemical formula of Papagoite- CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Papagoite and Black Opal Specific Gravity

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