Black Opal and Rubellite Physical Properties

Black Opal and Rubellite Chemical Formula

While comparing Black Opal and Rubellite 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 Black Opal and Rubellite chemical formula.

• Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
• Chemical formula of Rubellite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Black Opal and Rubellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Black Opal and Rubellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Black Opal and Rubellite Optical Properties during the identification of gemstone. Specific gravity of Black Opal is 3.01-3.06 whereas that of Rubellite is 3.01-3.06.