Common maker's marks on gold jewelry usually include the company's name or initials with a symbol and country's origin. A maker's mark can be determined by inspecting the jewelry with a jeweler's loupe and the combination of name and symbol can be looked up in an online database such as the one found on LangAntiques.com.
Jewelry hallmarks and maker's marks refer to symbols that can determine the maker, age, origin and value of a piece of gold jewelry. Maker's marks are also common in clocks and sterling silver items. Common examples include Cartier, whose maker's mark is the company name written in script with a karat hallmark and Arabic numerals. Tiffany & Company marks its jewelry with the company's name in all capital block lettering and a metal hallmark.