Hyalite and Alexandrite Physical Properties

Hyalite and Alexandrite Chemical Formula

While comparing Hyalite 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 Hyalite and Alexandrite chemical formula.

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

Hyalite and Alexandrite Specific Gravity

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