Silver
Silver has standards of its own. Such as Fine Silver, Britannia Silver, Sterling Silver and a few others. Fine silver has a millesimal fineness of 999 and is 99.9% pure. Britannia Silver has a millesimal fineness of at least 958 and is 95.84% pure. And Sterling Silver has a millesimal fineness of 925 and is 92.5% pure.
Click the button below to learn more about the different types of stamps on silver.