Fine Silver is 99.9% Silver (999) used in silver bullion bars. Pure Silver, also known as fine silver is considered to be relatively soft, malleable and easily damaged, so it is commonly combined with other metals which in turn helps to produce a more durable and long-lasting product. Sterling Silver is 92.5% silver (925). On silver pieces, this is marked as 925. In sterling silver, 92.5% of the object by weight is silver and 7.5% will be another alloy, usually copper.