Buying gold bars is another choice and it is around 99% pure. There are many refineries to choose from like Metalor, Johnson Matthey, Credit Suisse, and PAMP. The gold coins are 22-karat gold and are mined in the US. Bullion coins can include Austrian Philharmonic, South African Krugerrand, Australian Kangaroo, and Canadian Maple Leaf. You will need to pick the weight of the gold that you buy. The higher the weight, the higher is the value of the gold.