Common jewelry maker's marks include the initials of the name of the maker, a trademark symbol of the maker or the full name of the manufacturing firm. Some makers prefer to stamp representative numbers on their jewelry. The maker's logo is another typical jewelry maker's mark.
Both vintage and contemporary jewelry have identifying marks by the makers. These unique marks not only identify the jewelers but also the authenticity of the jewelry and the year of manufacture. There are online resources to help antique collectors identify makers of jewelry. Due to the large number of jewelry maker's marks, some online resources categorize them according to the maker's country of origin or the historical time in which the jewelry was made.