Ruby and Andalusite Physical Properties

Ruby and Andalusite Chemical Formula

While comparing Ruby 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 Ruby and Andalusite chemical formula.

• Chemical formula of Ruby- Al ₂ O ₃
• Chemical formula of Andalusite- Al 2SiO 5Michael O’Donoghue , Gems, Sixth edition (2006) More from other references

Ruby and Andalusite Specific Gravity

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