Smoky Quartz and Onyx Physical Properties

Smoky Quartz

Onyx

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.65

2.55-2.70

1.5 Fracture

Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)

Not Available

1.6 Cleavage

{0110} Indistinct

Indiscernible

1.7 Mohs Hardness

6.5-7

1.8 Chemical Composition

SiO₂

Smoky Quartz and Onyx Chemical Formula

While comparing Smoky Quartz 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 Smoky Quartz and Onyx chemical formula.

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

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Smoky Quartz and Onyx Specific Gravity

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