Moissanite and Onyx Physical Properties

Moissanite

Onyx

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

none

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.17-3.242.55-2.70

1 7.18

1.5 Fracture

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle

Not Available

1.6 Cleavage

(0001) indistinct

Indiscernible

1.7 Mohs Hardness

9-9.56.5-7

2 10

1.8 Chemical Composition

SiCArthur Thomas , Gemstones (2009)

SiO₂

Moissanite and Onyx Chemical Formula

While comparing Moissanite 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 Moissanite and Onyx chemical formula.

Chemical formula of Moissanite- SiCArthur Thomas , Gemstones (2009)
Chemical formula of Onyx- SiO₂

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Moissanite and Onyx Specific Gravity

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