“Fine silver” refers to the purity of the silver, or the weight of pure silver in an object, compared to its total weight. The purity of silver is determined with Millesimal fineness, which expresses the purity of silver in decimal. Fine silver is often used in bullion for investment purposes, including bars, rounds, and coins, and generally must be at least .999 or 99.9% fine.
Fine silver can be viewed as being too soft for everyday use, such as jewelry, which is why the precious metal is sometimes mixed with other metals outside of bullion to increase its durability. Sterling silver is frequently used for jewelry because it’s more durable than fine silver, comprised of 92.5% silver and 7.5% copper.
