In Canada many suitably located pipes (and glacial deposit finds) indicate that there is a possibility of economic diamond-bearing formations in the north. Alluvial localities, perhaps reweathered with their prime source long gone, are numerous. Sporadic diamonds are found in gold placers in the eastern U.S. and in California. In recent decades Siberia has become an important source. Brazil, New Guinea, India, Namibia, and other African states have many localities, though none has proved notably large or abundant.