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Onyx
Onyx

Anhydrite
Anhydrite



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Onyx
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Anhydrite

Onyx and Anhydrite Physical Properties

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1 Physical Properties
1.1 Tenacity
Not Available
Brittle
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.55-2.702.90-2.98
Amber
1 7.18
1.5 Fracture
Not Available
Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.6 Cleavage
Indiscernible
Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.
1.7 Mohs Hardness
6.5-73.5
Amber
2 10
1.8 Chemical Composition
SiO2
CaSO 4Michael O’Donoghue , Gems, Sixth edition (2006) More from other references

Onyx and Anhydrite Chemical Formula

While comparing Onyx and Anhydrite 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 Anhydrite chemical formula.

  • Chemical formula of Onyx- SiO2
  • Chemical formula of Anhydrite- CaSO 4Michael O’Donoghue , Gems, Sixth edition (2006) More from other references

Onyx and Anhydrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Anhydrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Anhydrite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 2.90-2.98 whereas that of Anhydrite is 2.90-2.98.