Pezzottaite and Opal Physical Properties

Pezzottaite

Opal

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1 Physical Properties

1.1 Tenacity

Not Available

BrittleWalter Schumann

1.2 Solubility

Not Available

hot salt water

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.14

1.98-2.25

1.5 Fracture

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

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle

1.6 Cleavage

Imperfect; basal

None

1.7 Mohs Hardness

7.5-8

5-6.5

1.8 Chemical Composition

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

SiO₂ · nH₂O

Pezzottaite and Opal Chemical Formula

While comparing Pezzottaite and 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 Opal chemical formula.

Chemical formula of Pezzottaite- (Be,Cs) 3Al 2Si 6O 18 · 0.5H 2OUlrich Henn and Claudio C.
Chemical formula of Opal- SiO₂ · nH₂O

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Pezzottaite and Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pezzottaite and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pezzottaite and Opal Optical Properties during the identification of gemstone. Specific gravity of Pezzottaite is 1.98-2.25 whereas that of Opal is 1.98-2.25.