Fire Opal and Iolite Physical Properties

Fire Opal and Iolite Chemical Formula

While comparing Fire Opal and Iolite 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 Fire Opal and Iolite chemical formula.

• Chemical formula of Fire Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references
• Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈

Fire Opal and Iolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Fire Opal and Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Fire Opal and Iolite Optical Properties during the identification of gemstone. Specific gravity of Fire Opal is 2.6-2.7 whereas that of Iolite is 2.6-2.7.