Emerald miner Gemfields reports 7 pct fall in prices at Lusaka auction
By Brenton Cordeiro April 22 (Reuters) - Emerald miner Gemfields Plc reported a 7 percent decline in average per-carat prices at its lower-quality gemstone auction earlier this month, hurt by a recent directive by the Zambia government that prevents the overseas sale of gemstones mined in
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