Umbalite and Star Sapphire Physical Properties

Umbalite and Star Sapphire Chemical Formula

While comparing Umbalite and Star Sapphire 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 Umbalite and Star Sapphire chemical formula.

• Chemical formula of Umbalite- Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
• Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.

Umbalite and Star Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Umbalite and Star Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Umbalite and Star Sapphire Optical Properties during the identification of gemstone. Specific gravity of Umbalite is 3.90-4.05 whereas that of Star Sapphire is 3.90-4.05.