raw specimen of brass-yellow mineral rock of chalcopyrite copper iron sulfide mineral stone.

art background barite bedrock black boulder brown calcite carbon carbonate carving charcoal clay close-up coal divided economic feldspar formation fossil fuel geology granite gypsum hand hematite industrial iron isolated jewellery macro magnetite metal metallic mica microcline mineral minerals muscovite museum natural nature nonmetallic object ore phyllosilicate piece raw realgar rock rough sculpture soil specimen stone stonewall sulfate sulfide talcum value sample lepidolite common opal psilomelane hard manganese oxides stibnite antimonite chalcopyrite copper white brass-yellow stone