Onyx and Phosgenite Physical Properties

Onyx

Phosgenite

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1 Physical Properties

1.1 Tenacity

Not Available

Sectile

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.706.13

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Indiscernible

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

1.7 Mohs Hardness

6.5-72-3

2 10

1.8 Chemical Composition

SiO₂

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

Onyx and Phosgenite Chemical Formula

While comparing Onyx and Phosgenite 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 Phosgenite chemical formula.

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

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Onyx and Phosgenite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Phosgenite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Phosgenite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 6.13 whereas that of Phosgenite is 6.13.