Perth Mint sets Guinness record for world's largest gold bar.

The record-breaking gold bar is made from Australian gold. A gold bar produced in Western Australia weighing more than half a tonne has claimed the Guinness World Records title for the world's largest gold bar. The Perth Mint created the 521.2 kilogram bar using Australian gold, refined to a 99.999 per cent purity. Mint chief executive Paul Graham said the current world standard was 99.99 per cent. "To get to five-nines gold, 99.999, not many can do that," he said. It's nothing short of a miracle." The achievement broke the previous world record of 300 kilograms, set by a mint...