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Black Opal
Black Opal

Gaylussite
Gaylussite



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Black Opal
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Gaylussite

Black Opal and Gaylussite Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
decomposes in water
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.97-2.22
1.93-1.99
1.5 Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Conchoidal, Conchoidal, Brittle
1.6 Cleavage
Not Available
perfect [110]
1.7 Mohs Hardness
6-6.5
2.5
1.8 Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.
Na2Ca(CO3)2•5(H2O)

Black Opal and Gaylussite Chemical Formula

While comparing Black Opal and Gaylussite 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 Black Opal and Gaylussite chemical formula.

  • Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
  • Chemical formula of Gaylussite- Na2Ca(CO3)2•5(H2O)

Black Opal and Gaylussite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Black Opal and Gaylussite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Black Opal and Gaylussite Optical Properties during the identification of gemstone. Specific gravity of Black Opal is 1.93-1.99 whereas that of Gaylussite is 1.93-1.99.