Crystal Opal and Umbalite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.97-2.22
3.62-4.33
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Uneven, Uneven, ConchoidalGemdat.org, Management Team (2012)
Cleavage
Not Available
Not Available
Mohs Hardness
5.5-6.5
7-7.5
Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.
Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
Crystal Opal and Umbalite Chemical Formula
While comparing Crystal Opal and Umbalite 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 Umbalite chemical formula.
- Chemical formula of Crystal Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
- Chemical formula of Umbalite- Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
Crystal Opal and Umbalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Crystal Opal and Umbalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Crystal Opal and Umbalite Optical Properties during the identification of gemstone. Specific gravity of Crystal Opal is 3.62-4.33 whereas that of Umbalite is 3.62-4.33.