Opening Of Rio Tinto's Underground Expansion Of The Argyle Diamond Min

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William 'Bill' Marmion, Western Australia's minister for mines and... ニュース写真Rio Tinto Group,アジア大陸,オセアニア,オーストラリア,オーストラリア文化,オーストラレーシア,カナナラ,ダイヤモンド,ファイナンス,人工物,大臣,宝石,式典,成長,横長,石油産業,西オーストラリア州,話す,貴石,配達,鉱山,鉱山労働者,鉱業,開会式Photographer Collection: Bloomberg 2013 BloombergWilliam 'Bill' Marmion, Western Australia's minister for mines and petroleum, speaks during the opening ceremony of Rio Tinto Group's underground expansion of the Argyle diamond mine in Kimberley, Australia, on Tuesday, April 30, 2013. Production at Argyle, which supplies more than 90 percent of the world’s pink diamonds, will rise to 20 million carats annually as production moves underground, while costs will fall. Photographer: Ian Waldie/Bloomberg via Getty Images