Amethyst and Andalusite Physical Properties

Amethyst and Andalusite Chemical Formula

While comparing Amethyst and Andalusite 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 Amethyst and Andalusite chemical formula.

• Chemical formula of Amethyst- SiO₂
• Chemical formula of Andalusite- Al 2SiO 5Michael O’Donoghue , Gems, Sixth edition (2006) More from other references

Amethyst and Andalusite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Amethyst and Andalusite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Amethyst and Andalusite Optical Properties during the identification of gemstone. Specific gravity of Amethyst is 3.05-3.21 whereas that of Andalusite is 3.05-3.21.