Jewelry packs a lot of information into a small object. Metal purity marks, the style of the setting, the cut of the stones and even the type of clasp all help date a piece and separate fine antique jewelry from costume pieces.
Use a loupe or your phone’s macro mode — the most valuable clues are tiny.
Find and read the hallmarks
Look on the inside of a ring shank, the clasp of a necklace or the pin stem of a brooch for tiny stamped hallmarks: metal purity (9k, 14k, 18k, 750, 925, “sterling”), a maker’s mark and, in some countries, an assay and date letter. These often identify origin and era outright.
Study the setting and construction
How stones are held reveals age. Older pieces use closed-back or bezel settings and hand-finished galleries; later pieces use open-back and prong settings. Hand-fabricated details and slight asymmetry indicate earlier work; cast uniformity indicates modern production.
Look at the stone cuts
Cutting styles are era markers. Old mine and old European cuts predate the modern brilliant; rose cuts are older still. Foil-backed or closed-back stones point to Georgian and early Victorian work. Perfectly calibrated modern brilliants suggest a recent piece.
Check the clasp and findings
Clasps date jewelry reliably. C-clasps and long pin stems on brooches suggest Victorian or earlier; safety catches and modern lever clasps came later. Screw-back and clip earrings predate widespread pierced-ear fittings.
Quick checklist
- Find hallmarks on shank, clasp or pin stem
- Note the setting style — bezel vs prong
- Identify the stone cut
- Examine the clasp or earring findings
- Weigh materials: fine vs costume
Do it in seconds with Curio
Curio helps you place a piece even without expert tools:
- Photograph the piece and a macro shot of any hallmark
- Curio identifies the likely era, style and materials
- Get an estimated value range and whether it reads as fine or costume jewelry
Frequently asked questions
What’s the difference between antique and vintage jewelry?
Antique jewelry is generally 100+ years old; vintage is roughly 20–100 years old. Hallmarks, cuts and clasps help place a piece within that range.
How do I know if jewelry is real gold or silver?
Look for purity hallmarks (14k, 18k, 750, 925, sterling). Curio can read these from a clear macro photo and factor them into the estimate.
Can costume jewelry be valuable?
Yes — signed designer costume jewelry from sought-after makers can be collectible, which is why identifying the maker matters.
