Onyx and Aquamarine Physical Properties

Onyx

Aquamarine

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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

2.66-2.80

1.5 Fracture

Not Available

1.6 Cleavage

Indiscernible

3,1 basal

1.7 Mohs Hardness

6.5-7

7.5-8

1.8 Chemical Composition

SiO₂

Be₃Al₂SiO₆

Onyx and Aquamarine Chemical Formula

While comparing Onyx and Aquamarine 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 Aquamarine chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Aquamarine- Be₃Al₂SiO₆

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Onyx and Aquamarine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Aquamarine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Aquamarine Optical Properties during the identification of gemstone. Specific gravity of Onyx is 2.66-2.80 whereas that of Aquamarine is 2.66-2.80.