Common Opal and Londonite Physical Properties

Common Opal and Londonite Chemical Formula

While comparing Common Opal and Londonite 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 Common Opal and Londonite chemical formula.

• Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
• Chemical formula of Londonite- (Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)

Common Opal and Londonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Common Opal and Londonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Common Opal and Londonite Optical Properties during the identification of gemstone. Specific gravity of Common Opal is 3.34 whereas that of Londonite is 3.34.