Onyx and Fuchsite Physical Properties

Onyx

Fuchsite

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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

2.55-2.70

2.77-2.88

1.5 Fracture

Not Available

Uneven

1.6 Cleavage

Indiscernible

Perfect basal

1.7 Mohs Hardness

6.5-7

2.5

1.8 Chemical Composition

SiO₂

K(Al,Cr) 3Si 3O 10(OH) 2Gemdat.org , Management Team (2012)

Onyx and Fuchsite Chemical Formula

While comparing Onyx and Fuchsite 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 Fuchsite chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Fuchsite- K(Al,Cr) 3Si 3O 10(OH) 2Gemdat.org , Management Team (2012)

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Onyx and Fuchsite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Fuchsite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Fuchsite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 2.77-2.88 whereas that of Fuchsite is 2.77-2.88.