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  • Raw emerald auctions are done by GEMFIELDS a London based company which has mining operations in South Africa and other countries mining also ruby gemstone and amethyst. Watch here online auctions of natural emeralds of premium quality. Premium IGI GIA certified emerald on bid auctions / GRS certified emerald auctions / emeralds for bidding under hammer / no oil and minor oil emeralds / untreated emerald gemstone / Colombian emeralds auction websites / Zambian emerald for sale / emerald jewellery for sale / emerald ring and jewelry auction grade / collectors emerald for sale at auction house