An investigation in Brazil has identified Italian company Chimet, which refines precious metals for the jewelry industry, as a buyer of gold mined illegally from an Indigenous reserve in the Amazon.The allegations follow a police operation that cracked down on the web of illegal miners, middlemen and exporters who “launder” the gold to conceal its origin.Chimet has denied the allegations, saying it only buys from suppliers whose paperwork is in order; Italian police say that if the export documents were forged in Brazil, it’s a matter for the Brazilian police.Mining in Indigenous territories i…