Hayne and Hercynite Chemical Formula
While comparing Hayne and Hercynite 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 Hayne and Hercynite chemical formula.
>- Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)