Gold bars are solid pieces of gold that are typically produced by refineries and are used as a form of investment or storage of wealth. They come in various sizes, with the most common being the London Good Delivery bar, which weighs about 400 troy ounces (approximately 12.4 kilograms). Gold bars are valued based on their weight and purity, usually measured in karats or fineness. Investors often purchase gold bars as a hedge against inflation or economic uncertainty. Unlike gold coins, which may have numismatic value, gold bars are primarily valued for their metal content. They can be bought from dealers, banks, or online platforms, and are often stored in secure facilities or vaults.