Onyx and Diamond Physical Properties

Onyx

Diamond

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.703.50-3.53

1 7.18

1.5 Fracture

Not Available

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Conchoidal, Brittle

1.6 Cleavage

Indiscernible

111 (perfect in four directions)

1.7 Mohs Hardness

6.5-710

2 10

1.8 Chemical Composition

SiO₂

Onyx and Diamond Chemical Formula

While comparing Onyx and Diamond 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 Diamond chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Diamond- C

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Onyx and Diamond Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Diamond Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Diamond Optical Properties during the identification of gemstone. Specific gravity of Onyx is 3.50-3.53 whereas that of Diamond is 3.50-3.53.