mineral : galenite, siderite

aggregate brown calcite calcium carbonate closeup color compound crystal crystalline crystals druse drusie earth element ferriferous ferrous galena galenite geology hematite industry iron ironstone lead macro material matrix metal metallic metallurgy mineral mineralogy mining missouri natural nature orange ore pbs plumbum raw rock rough sample siderite silver source souvenir specimen steel steelwork stone sulphide texture textures white yellow