Onyx and Pezzottaite Physical Properties

Onyx

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

2.55-2.702.90-3.14

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Indiscernible

Imperfect; basal

1.7 Mohs Hardness

6.5-77.5-8

2 10

2.5 Chemical Composition

SiO₂

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

Onyx and Pezzottaite Chemical Formula

While comparing Onyx 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 Onyx and Pezzottaite chemical formula.

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

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Onyx and Pezzottaite Specific Gravity

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