chrome stone extracted from mine

silver macro investment chemistry rock rough closeup nuggets background precious stones grey economy hoard economic shiny ore stone khabarovsk krai native metallic metal natural mineral platinum nugget valuable chemical element mining russian wealth specimen raw material fine russia artifact resource digger pure periodic table system geology white isolated purity kondyor massif africa galena geological cobaltite cobalt skutterudite nickel structure sulfide titanite gemstone high extraction industrial basic chromatic manganese iron brilliant chrome alloy shine nature chromium melter extracted black