Andean Opal and Covellite Chemical Formula
While comparing Andean Opal and Covellite 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 Andean Opal and Covellite chemical formula.
>- Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references