Boulder Opal and Pezzottaite Physical Properties

Boulder Opal

Pezzottaite

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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

1.98-2.252.90-3.14

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

Not Available

Imperfect; basal

1.7 Mohs Hardness

5-6.57.5-8

2 10

1.8 Chemical Composition

SiO 2 + H 2OUlrich Henn and Claudio C.

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

Boulder Opal and Pezzottaite Chemical Formula

While comparing Boulder Opal and Pezzottaite 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 Boulder Opal and Pezzottaite chemical formula.

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

Compare Blue Gemstones

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Boulder Opal Vs Chrysocolla

Boulder Opal Vs Chrome Tourmaline

Boulder Opal and Pezzottaite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Boulder Opal and Pezzottaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Boulder Opal and Pezzottaite Optical Properties during the identification of gemstone. Specific gravity of Boulder Opal is 2.90-3.14 whereas that of Pezzottaite is 2.90-3.14.