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Gibbsite
Gibbsite

Opal
Opal



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Gibbsite
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Opal

Gibbsite and Opal Physical Properties

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1 Physical Properties
1.1 Tenacity
Not Available
BrittleWalter Schumann
1.2 Solubility
Not Available
hot salt water
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.351.98-2.25
Amber
1 7.18
1.5 Fracture
Fibrous, Difficult, Fibrous
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
1.6 Cleavage
{001} Perfect
None
1.7 Mohs Hardness
2.5-35-6.5
Amber
2 10
1.8 Chemical Composition
Al(OH)3
SiO2 · nH2O

Gibbsite and Opal Chemical Formula

While comparing Gibbsite and Opal 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 Gibbsite and Opal chemical formula.

  • Chemical formula of Gibbsite- Al(OH)3
  • Chemical formula of Opal- SiO2 · nH2O

Gibbsite and Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gibbsite and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gibbsite and Opal Optical Properties during the identification of gemstone. Specific gravity of Gibbsite is 1.98-2.25 whereas that of Opal is 1.98-2.25.