The 1oz Umicore gold bullion bar is one of the most popular investment gold bars available. Produced by Umicore, an LBMA accredited refinery, each bar comes with an individual certificate of authenticity in tamper-proof packaging.rnWeight: 1oz (31.1g)rnPure Content: 1 troy ozrnFineness: 9999rnCarat: 24 carat