sulphide copper nickel ore texture close-up. mineral stone surface background.

allocation alloy background barite bornite chalcopyrite closeup copper crystal cubanite galena gem gemstone geological geology golden industry macro material metal metallic mine miner mineral mineralogy mining natural nature nickel nugget ore petlandia platinum polymetallic pyrrhotite quartz raw resource rock science shaft siberia silica specimen sphalerite stone sulfide sulphide surface unique