are the marks inside my gold jewelry? Look for trademarks
accompanying the quality mark. When a piece of jewelry is stamped
with a quality mark, law requires that it be stamped with a hallmark
or trademark as well. In the United States, 14-karat gold is used
most commonly for jewelry. Fourteen-karat gold is 14/24ths, or
slightly more than one-half pure gold. Jewelry of this fineness is
marked "14k" or "585," the European designation
meaning 58.5 percent gold. Details.