Gold is used in minute quantities in many electrical items because of its conductivity and resilience. Even the sim card in your mobile phone contains a layer of gold thinner than your hair.

Jem Stansfield throws his own mobile phone in with bits of old computers and circuit boards in an attempt to create his own gold nugget but it is not an easy task - potentially lethal acids and temperatures of 1,000C are needed if the experiment is to work.

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