China. Copper – Australia was the world's 6th largest producer in 2019 (5% of world's production). Gold – Australia was the second largest producer after China in 2019, producing , 10% of the world's output. Silver – In 2019 Australia was the sixth largest producer, producing , 5% of the world's output. Uranium – Australia is responsible for 12% of the world's production and was the world's third largest producer in 2018, after Kazakhstan and Canada. Diamond – Australia has the third largest commercially viable deposits after Russia and Botswana. Australia also boasts the richest diamantiferous pipe with production reaching peak levels of 42 metric tons (41 LT/46 ST) per year in the 1990s. Opal – Australia is the world's largest producer of opal, being responsible for 95% of production. Zinc – Australia was third to China and Peru in zinc production in 2019, producing 1.3 million tonnes, 10% of world production. Coal – Australia is the world's largest exporter of coal and fourth largest producer of coal behind China, USA and India. Oil shale – Australia has the sixth largest defined oil shale resources. Petroleum – In 2019 Australia was the thirty-third largest producer of petroleum. Natural gas – Australia is world's largest exporter of LNG with 77.5 million tonnes in 2019. Rare earth elements – In 2019 Australia was the third largest producer after China and USA, with 10% of the world's output. Much of the raw material mined in Australia is exported overseas to countries such as China for processing into refined product. Energy and minerals constitute two-thirds of Australia's total exports to China, and more than half of Australia's iron ore exports are to China. Statistical chart of Australia's major mineral resources Australia ranks among the top 4 in economic resources for 21 primary industrial minerals, more than any other nation. Statistics are for December 2016. Units of measurement: t = tonne; kt = kilotonne (1,000 t); Mt = million tonne (1,000,000 t); Mc = million carat (1,000,000 c) Coal mining Coal is mined in every state of Australia except South Australia. It is used to generate electricity and is exported. 54% of the coal mined in Australia is exported, mostly to eastern Asia. In 2000/01, 258.5 million tonnes of coal was mined, and 193.6 million tonnes exported, rising to 261 million tonnes of exports in 2008–09. Coal also provides about 85% of Australia's electricity production.