Chalcedony and Umbalite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.55-2.70
3.62-4.33
Fracture
Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann
Uneven, Uneven, ConchoidalGemdat.org, Management Team (2012)
Cleavage
Absent
Not Available
Mohs Hardness
6.5-7
7-7.5
Chemical Composition
SiO2
Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
Chalcedony and Umbalite Chemical Formula
While comparing Chalcedony 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 Chalcedony and Umbalite chemical formula.
- Chemical formula of Chalcedony- SiO2
- Chemical formula of Umbalite- Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
Chalcedony and Umbalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Chalcedony and Umbalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chalcedony and Umbalite Optical Properties during the identification of gemstone. Specific gravity of Chalcedony is 3.62-4.33 whereas that of Umbalite is 3.62-4.33.