It is difficult to understand the specific date that human beings first began to mine gold, but several of the earliest well-known gold artefacts were located in the Varna Necropolis in Bulgaria. The graves of the necropolis were developed between 4700 and 4200 BC, indicating that gold mining could be at least 7000 years of [ ]
http://worldgeographicchannel.com/gold-mining-the-hunt-for-mankinds-most-precious-metal/
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