Agate Opal and Alexandrite Physical Properties

Agate Opal and Alexandrite Chemical Formula

While comparing Agate Opal and Alexandrite 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 Agate Opal and Alexandrite chemical formula.

• Chemical formula of Agate Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
• Chemical formula of Alexandrite- BeAl ₂ O ₄

Agate Opal and Alexandrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Agate Opal and Alexandrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Agate Opal and Alexandrite Optical Properties during the identification of gemstone. Specific gravity of Agate Opal is 3.69-3.81 whereas that of Alexandrite is 3.69-3.81.