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Onyx
Onyx

Chalcedony
Chalcedony



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X
Onyx
X
Chalcedony

Onyx and Chalcedony Physical Properties

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1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Soluble
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.55-2.702.55-2.70
Amber
1 7.18
2.5 Fracture
Not Available
Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann
2.6 Cleavage
Indiscernible
Absent
2.7 Mohs Hardness
6.5-76.5-7
Amber
2 10
2.11 Chemical Composition
SiO2
SiO2

Onyx and Chalcedony Chemical Formula

While comparing Onyx and Chalcedony 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 Chalcedony chemical formula.

  • Chemical formula of Onyx- SiO2
  • Chemical formula of Chalcedony- SiO2

Onyx and Chalcedony Specific Gravity

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