Phosgenite and Onyx Physical Properties

Phosgenite

Onyx

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1 Physical Properties

1.1 Tenacity

Sectile

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

6.132.55-2.70

1 7.18

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), (e.g. graphite).

Not Available

1.6 Cleavage

Distinct on {001} and {110}, indistinct on {100}

Indiscernible

1.7 Mohs Hardness

2-36.5-7

2 10

1.8 Chemical Composition

Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

SiO₂

Phosgenite and Onyx Chemical Formula

While comparing Phosgenite 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 Phosgenite and Onyx chemical formula.

Chemical formula of Phosgenite- Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Onyx- SiO₂

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Phosgenite and Onyx Specific Gravity

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