close up of electrical engineer inspecting copper windings in electrical engineering factory - copper foto e immagini stock
the background is made of a rusty metal surface. trendy background in the style of grunge - copper foto e immagini stock
copper ore from arizona, usa. rich in copper minerals, this is part of a boulder that was mined south of tucson. the blue-green is chrysocolla, the blue is azurite and the green is malachite. - copper foto e immagini stock