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Onyx
Onyx

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Brucite



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Onyx and Brucite Physical Properties

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1 Physical Properties
1.1 Tenacity
Not Available
Sectile
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.55-2.70
2.39
1.5 Fracture
Not Available
Irregular
1.6 Cleavage
Indiscernible
Perfect on {0001}
1.7 Mohs Hardness
6.5-7
2.5
1.8 Chemical Composition
SiO2
Mg(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Onyx and Brucite Chemical Formula

While comparing Onyx and Brucite 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 Brucite chemical formula.

  • Chemical formula of Onyx- SiO2
  • Chemical formula of Brucite- Mg(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Onyx and Brucite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Brucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Brucite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 2.39 whereas that of Brucite is 2.39.