主播大秀

Nick Rankin explores how we assess the value of gold.

From Olympic winners' medals to "bling", gold is everywhere. There is a dollar's worth of gold in every mobile phone.

With the price of the metal going up in recent years, the documentary examines why more and more people have got gold on their minds.

Also under consideration is the cost of gold - to the people who battle to get it, and to the planet.