Welcome to the Makers’ Marks and Hallmarks Library a comprehensive resource for identifying fine jewelry across history. Our collection includes authentic makers’ marks, hallmarks, and gold or platinum assay stamps from American, French, British, Italian, Swiss, Russian, and global jewelry houses. Whether you’re a collector, dealer, appraiser, or simply a jewelry enthusiast, this library is designed to help you recognize authentic signatures, understand how marks have changed over time, and avoid common counterfeits.
Featuring legendary names like Tiffany & Co., Cartier, Van Cleef & Arpels, Bulgari, and Buccellati, alongside hundreds of historic workshops and regional makers, the library combines detailed sketches, hallmark photos, and explanatory notes in one searchable platform. Use our faceted filters to search by country, era, or metal type, or dive deeper into our dedicated Counterfeit Hallmarks section for side-by-side comparisons of genuine versus forged marks.
Our mission is to build the largest and most reliable jewelry hallmark reference online, drawing on trusted sources such as auction house archives, historic manufacturer registries, and gemological research. Bookmark this page as your go-to hallmark reference and discover the stories behind the stamps that shaped fine jewelry.

Makers’ Marks & Jewelry Hallmarks Library

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Counterfeit Marks — Common Watchouts

These are general guides; corroborate with professional appraisal, assay documentation, and reputable literature.