Spinel and Ruby Physical Properties

Spinel and Ruby Chemical Formula

While comparing Spinel and Ruby 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 Spinel and Ruby chemical formula.

• Chemical formula of Spinel- MgAl₂O₄
• Chemical formula of Ruby- Al ₂ O ₃

Spinel and Ruby Specific Gravity

Another important criteria for qualitative analysis of gemstones is Spinel and Ruby Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Ruby Optical Properties during the identification of gemstone. Specific gravity of Spinel is 3.97-4.05 whereas that of Ruby is 3.97-4.05.