Chrysocolla heart cabochon with fantastic blues and greens, fine silver setting with tail feathers stamped edging and bead wire accent, studio fabricated feather  toggle and new old stock wheat chain, 24" 
Chrysocolla is a hydrated copper silicate mineral, while turquoise is a hydrous phosphate of copper and aluminum.  Chrysocolla is formed through the oxidation of copper, while turquoise is formed from the filtration of aqueous liquids through profoundly altered rocks.