Diamond and Onyx Physical Properties

Diamond

Onyx

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.50-3.532.55-2.70

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

111 (perfect in four directions)

Indiscernible

1.7 Mohs Hardness

106.5-7

2 10

1.8 Chemical Composition

SiO₂

Diamond and Onyx Chemical Formula

While comparing Diamond 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 Diamond and Onyx chemical formula.

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

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Diamond and Onyx Specific Gravity

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