Onyx and Omphacite Physical Properties

Onyx

Omphacite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.703.16-3.43

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Indiscernible

{110} Good, {110} Good

1.7 Mohs Hardness

6.5-75-6

2 10

1.8 Chemical Composition

SiO₂

(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)

Onyx and Omphacite Chemical Formula

While comparing Onyx and Omphacite 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 Omphacite chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Omphacite- (Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)

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Onyx and Omphacite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Omphacite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Omphacite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 3.16-3.43 whereas that of Omphacite is 3.16-3.43.