Powellite and Onyx Physical Properties

Powellite

Onyx

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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

4.232.55-2.70

1 7.18

1.5 Fracture

UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

Not Available

1.6 Cleavage

{111} Distinct

Indiscernible

1.7 Mohs Hardness

3.5-46.5-7

2 10

1.8 Chemical Composition

CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

SiO₂

Powellite and Onyx Chemical Formula

While comparing Powellite and Onyx 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 Powellite and Onyx chemical formula.

Chemical formula of Powellite- CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Onyx- SiO₂

Compare Blue Gemstones

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Powellite Vs Rock Crystal

Powellite and Onyx Specific Gravity

Another important criteria for qualitative analysis of gemstones is Powellite and Onyx Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Powellite and Onyx Optical Properties during the identification of gemstone. Specific gravity of Powellite is 2.55-2.70 whereas that of Onyx is 2.55-2.70.