Gold Bars provide investors with a cost-effective way to own gold at a lower premium. The absolute standard for gold purity in the bullion market is .9999 pure gold. Gold bars are often the first thing that comes to mind when considering gold bullion, and with good reason. Gold bars are found in a variety of sizes and designs. 10 oz. gold bars are popular with investors as they provide a larger amount of high quality gold with one easy purchase. Gold bars are produced by private mints and government mints around the world, including Johnson Matthey, Credit Suisse, PAMP, and the Perth Mint.