Sandfire Resources (ASX:SFR) is a copper mining company with operations in Western Australia, Spain and Botswana. The company's flagship asset is the DeGrussa mine in Western Australia, which is one of the world's lowest-cost copper mines. Sandfire is also developing the Motheo copper mine in Botswana. Sandfire's operations are focused on the production and sale of copper concentrate. The company's mines use a combination of open pit and underground mining methods. Sandfire also operates a processing plant at its DeGrussa Mine, which produces copper concentrate containing gold and silver by-products.