The Australian multinational Rio Tinto, the second largest minerals company in the world, began prospecting operations for kimberlites and diamonds in the commune of Chiri, province of Lunda-Norte, informed the company’s general director. The four-year prospecting phase takes place in a 75 hectare or 108 square kilometer mine, under the terms of a mining investment contract in Quimberlito do Chiri signed between the Ministry of Mineral Resources, Oil and Gas, Endiama and Rio Tinto ,
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