Costume Jewelry Worth Money: Signed Pieces and Hidden Gems
Which costume jewelry is worth money? How to find signatures, spot quality, check condition and value vintage brooches, necklaces and earrings.
By Ayoub Farid · · 2 min read
"It's just costume jewelry" is one of the most expensive phrases in estate clearing. Plenty of non-precious jewelry is worth little, but quality vintage pieces — especially signed ones — have an enthusiastic collector market.
Look for a signature
Turn pieces over and look on clasps, pin backs and earring backs for a stamped designer or maker's name. Signed pieces from well-known costume jewelry houses of the 20th century are the most collectible. A magnifier helps — signatures can be tiny or worn.
Signs of quality
Even unsigned pieces can be good. Look for:
- Prong-set stones rather than glued-in stones
- Heavy weight and solid construction
- Crisp detail in metalwork
- Rhodium or good-quality plating without wear-through
- Unusual designs: figural brooches, large statement necklaces
- Quality glass stones with bright sparkle (often foiled or "aurora borealis" finishes)
Condition matters a lot
Value drops sharply with:
- Missing or dark ("dead") stones
- Worn plating showing base metal
- Green corrosion
- Broken clasps and pin mechanisms
Sets are worth more
Matching sets (necklace, bracelet, earrings, brooch) — called parures — are worth more together than apart.
Don't miss the real stuff
Sort carefully: real gold and silver pieces are often mixed in. Check for purity stamps. See gold jewelry stamps and antique jewelry identification.
How to value it
- Sort into signed, unsigned quality, and everyday pieces.
- Identify signatures and look up sold prices.
- Judge condition honestly.
- Sell the best pieces individually; group the rest into lots.
Scan pieces with AntiqueIQ for a quick identification, era and estimated value range — handy when you have a whole jewelry box to sort.
Frequently asked questions
Is vintage costume jewelry worth anything?
Signed pieces by known designers and high-quality unsigned pieces can be. Common pieces sell modestly, often in lots.
How do I find a signature on jewelry?
Check the back of brooches, clasps of necklaces and bracelets, and earring backs under magnification.
Should I clean costume jewelry?
Gently, with a dry soft brush. Avoid water and chemicals, which can damage foils and glue.