Copper processing Ores, Refining, Smelting | Britannica
Ores A sample of chrysocolla after azurite, which is an example of a pseudomorph composed of orthorhombic copper hydroxyl silicate, from Ray Mine, Pinal county, Arizona, Copper in its native form, from Keweenaw, Houghton county, Michigan; in the Houston Museum of Natural Science, Texas.