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Secret History of Gold: Revealed

Johnson Matthey Refinery produces about a ton of gold every day, worth roughly thirty million dollars. Each bar of gold is stamped with an identifying serial number. However, refineries like Johnson Matthey also receive impure gold mixed with silver and copper called dore bars from many different sources.

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From the Amazon to Dubai, Explorer re-visits the underbelly of the modern gold trade with a treasure hunter and an illegal miner.