Sunstone and Umbalite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.62-2.65
  
3.62-4.33
  
Fracture
Gemstones of the world (2001)
  
Uneven, Uneven, ConchoidalGemdat.org, Management Team (2012)
  
Cleavage
001
  
Not Available
  
Mohs Hardness
6
  
7-7.5
  
Chemical Composition
Microcline: KAlSi3O8 Oligoclase: (Na,Ca)Al1-2Si3-2O8
  
Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
  
Sunstone and Umbalite Chemical Formula
While comparing Sunstone 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 Sunstone and Umbalite chemical formula.
- Chemical formula of Sunstone- Microcline: KAlSi3O8 Oligoclase: (Na,Ca)Al1-2Si3-2O8
- Chemical formula of Umbalite- Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
Sunstone and Umbalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sunstone and Umbalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sunstone and Umbalite Optical Properties during the identification of gemstone. Specific gravity of Sunstone is 3.62-4.33 whereas that of Umbalite is 3.62-4.33.