How to Tell If Gold Is Real: Safe Tests at Home
How to tell if gold is real: stamps, magnet test, discoloration, ceramic streak test and when to use a jeweler's acid or electronic test. Avoid damaging tests.
By Ayoub Farid · · 2 min read
Old jewelry boxes and coin tins often contain gold-colored items, and only some are real gold. These checks help you sort them — without damaging anything.
1. Look for stamps
Check clasps, ring shanks and inside surfaces for karat marks (10K, 14K, 18K) or numbers (417, 585, 750). Also look for plating marks like GF, GP, RGP or HGE. See gold jewelry stamps.
2. Magnet test
Gold isn't magnetic. If a strong magnet pulls the piece, it's not solid gold (or has a steel component like a spring). Passing the magnet test doesn't prove it's gold — many base metals aren't magnetic either.
3. Look for wear and discoloration
Plated items wear at edges, clasps and high points, revealing a different colored metal underneath. Green or black marks on skin can also suggest base metal.
4. Ceramic streak test (gentle)
Drag the item lightly across an unglazed ceramic tile. A gold streak suggests gold; a black or gray streak suggests other metals. It leaves a tiny scratch, so test on an inconspicuous area — and skip it on valuable antiques.
5. Weight and density
Gold is very dense. A piece that seems light for its size may be hollow or not gold. Precise density tests (water displacement) are possible but fiddly for small items.
Tests to avoid at home
- Biting — damages the piece and proves nothing
- Scratching deeply or filing — reduces value
- Home acid kits on antiques without experience — can leave marks
- Vinegar or bleach tests — unreliable and can damage stones or finishes
The reliable option: a jeweler
Jewelers and gold buyers can test with acid or electronic/XRF testers, often free and quickly. Get more than one quote if you're selling.
Don't scrap antique jewelry blindly
Antique and signed jewelry can be worth far more than its gold weight. Check the maker and period first. See antique jewelry identification.
Scan before you sell
Scan pieces with AntiqueIQ for an identification, era and estimated value range. If a piece may be collectible, consider an appraisal before selling for scrap.
Frequently asked questions
Does real gold stick to a magnet?
No. If it sticks strongly, it's not solid gold, though there may be steel parts like clasp springs.
Can real gold be unmarked?
Yes, especially old or hand-made pieces. A jeweler can test it.
What's the safest way to test gold?
Check stamps, use a magnet, then ask a jeweler for a professional test.