Onyx and Plumbogummite Physical Properties

Onyx

Plumbogummite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.70

4.014

1.5 Fracture

Not Available

Uneven, Conchoidal

1.6 Cleavage

Indiscernible

None

1.7 Mohs Hardness

6.5-7

4-5

1.8 Chemical Composition

SiO₂

Not Available

Onyx and Plumbogummite Chemical Formula

While comparing Onyx and Plumbogummite 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 Plumbogummite chemical formula.

Chemical formula of Onyx- SiO₂

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Onyx and Plumbogummite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Plumbogummite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Plumbogummite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 4.014 whereas that of Plumbogummite is 4.014.