Crystal Opal and Nepheline Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.97-2.22
2.55-2.65
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Cleavage
Not Available
[1010] Poor
Mohs Hardness
5.5-6.5
5-6
Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
Crystal Opal and Nepheline Chemical Formula
While comparing Crystal Opal and Nepheline 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 Crystal Opal and Nepheline chemical formula.
- Chemical formula of Crystal Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
- Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
Crystal Opal and Nepheline Specific Gravity
Another important criteria for qualitative analysis of gemstones is Crystal Opal and Nepheline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Crystal Opal and Nepheline Optical Properties during the identification of gemstone. Specific gravity of Crystal Opal is 2.55-2.65 whereas that of Nepheline is 2.55-2.65.