Making of the world's largest gold coin, a 2007 Canadian $ 1,000.000 Maple Leaf. This coin breaks all records: It weighs a staggering 100 kilos and measures 53 cm in diameter. But the most remarkable thing about this impressive coin, which cannot even be lifted by two men, is that it is made exclusively of the purest, finest and most refined gold: 999.99/1000 gold.