Onyx and Quartz Physical Properties

Onyx

Quartz

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.702.65

1 7.18

1.5 Fracture

Not Available

Conchoidal, Conchoidal, Brittle, Gems

1.6 Cleavage

Indiscernible

{0110} Indistinct

1.7 Mohs Hardness

6.5-77

2 10

1.8 Chemical Composition

SiO₂

Onyx and Quartz Chemical Formula

While comparing Onyx and Quartz 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 Quartz chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Quartz- SiO₂

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Onyx and Quartz Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Quartz Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Quartz Optical Properties during the identification of gemstone. Specific gravity of Onyx is 2.65 whereas that of Quartz is 2.65.