What are the markings to show if a ring is gold or silver?

Sterling silver rings are usually marked "sterling" or "925." Gold is usually marked with the karat, such as 10k, 14k, etc., but may also be marked 916 (22k), 750 (18k), 585 (14k), 417 (10k). European marks can also be 375 or 333, 9 8k respectively.