chalcanthite ore on white background, also known as copper sulphate is a richly colored blue/green water-soluble sulfate mineral

algicide amethyst background beautiful beauty blue bluestone bright chalcanthite chemical chemistry close cobalt copper crystal crystallization crystals cupric gem gemstone geological geologist geology glass isolated jewel laboratory macro material metal mine mineral mineralogy natural nature nugget object ore pattern precious raw rock salt sample science shiny specimen stone sulfate sulphate texture vitriol white