Beyond weight and the manufacturer, the purity of the gold makes a difference in its value. A scale of millesimal fineness is used to determine gold that is almost pure. Many fine gold pieces are labeled .9999, which means they contain 99.99 percent gold. Since 100 percent purity is practically impossible to achieve, the highest level of purity on the market is .99999. This is often used to make certain circulated gold coins for sale. For minted products, the most common fineness is .9999. The next category is 995, which is the minimum amount permissible in a Good Delivery gold bar. A Good Delivery gold bar is the standard 400-troy-ounce gold bar held as gold reserves by central banks and traded among bullion dealers. Because fine gold is so soft, it is not used for everyday products such as jewelry. It is reserved for investment purposes to use in gold bullion bars and coins. Fine gold has little or no impurities.



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