Pezzottaite and Black Opal Physical Properties

Pezzottaite

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

2.90-3.141.97-2.22

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle

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

1.6 Cleavage

Imperfect; basal

Not Available

1.7 Mohs Hardness

7.5-86-6.5

2 10

1.8 Chemical Composition

(Be,Cs) 3Al 2Si 6O 18 · 0.5H 2OUlrich Henn and Claudio C.

SiO 2 + H 2OUlrich Henn and Claudio C.

Pezzottaite and Black Opal Chemical Formula

While comparing Pezzottaite 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 Pezzottaite and Black Opal chemical formula.

Chemical formula of Pezzottaite- (Be,Cs) 3Al 2Si 6O 18 · 0.5H 2OUlrich Henn and Claudio C.
Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Pezzottaite and Black Opal Specific Gravity

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