Rutilated topaz and Precious Opal Physical Properties
Tenacity
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Solubility
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Durability
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Specific Gravity
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1.98-2.25
  
Fracture
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Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references
  
Cleavage
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Mohs Hardness
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5-6.5
  
Chemical Composition
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SiO 2 · nH 2OGemdat.org , Management Team (2012)
  
Rutilated topaz and Precious Opal Chemical Formula
While comparing Rutilated topaz and Precious 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 Rutilated topaz and Precious Opal chemical formula.
>- Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
Rutilated topaz and Precious Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Rutilated topaz and Precious Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rutilated topaz and Precious Opal Optical Properties during the identification of gemstone. Specific gravity of Rutilated topaz is 1.98-2.25 whereas that of Precious Opal is 1.98-2.25.