The boom is also being fuelled by demand for special-edition Jubilee coins, which contain just under one-quarter of an ounce of gold and are retailing for £140 each. The equivalent amount of gold on the spot market is worth £55. Sandra Ferguson, of dealer ATS Bullion, said trade in South African krugerrands, coins which contain up to an ounce of gold, had almost doubled since the gold price began to run.