Onyx and Pyrrhotite Physical Properties

Onyx

Pyrrhotite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.70

4.58-4.65

1.5 Fracture

Not Available

Uneven

1.6 Cleavage

Indiscernible

Absent

1.7 Mohs Hardness

6.5-7

3.5-4.5

1.8 Chemical Composition

SiO₂

Not Available

Onyx and Pyrrhotite Chemical Formula

While comparing Onyx and Pyrrhotite 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 Pyrrhotite chemical formula.

Chemical formula of Onyx- SiO₂

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Onyx and Pyrrhotite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Pyrrhotite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Pyrrhotite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 4.58-4.65 whereas that of Pyrrhotite is 4.58-4.65.