Buffeted by volatile global commodity prices and legislative uncertainty at home, Indonesia’s mineral output has fluctuated considerably in recent years. The mining sector comprised 11.24% of GDP in 2013, down slightly on 11.8% in 2012, but an improvement on the 8.94% recorded in 2004. Coal contributed $26.64bn to domestic exports in 2013, followed by copper ore at $3.38bn, nickel ore at $1.88bn...