Guide
How to tell if a coin is real
Fake and replica coins are sold in large numbers – as souvenirs, as 'copies' and as deliberate frauds. These checks catch most of them.
1. Weigh it
Every coin type has an official weight. A kitchen scale with 0.01 g precision is enough to catch many fakes; base-metal copies of silver and gold coins are often too light or too heavy.
2. Measure diameter and thickness
Gold is very dense. A fake with the right weight is often too thick or too wide. Compare with the official specifications.
3. Magnet test
Gold, silver and copper are not magnetic. If a 'silver dollar' sticks to a magnet, it contains iron or steel.
4. Look at the edge
Cast copies often show a seam or file marks on the edge. Reeding and edge lettering should be even and crisp.
5. Compare the details
Soft letters, grainy fields, wrong fonts or a portrait that looks 'melted' point to a copy. Compare with verified photos from grading services or auction archives.
6. Look for 'COPY'
Legal replicas are often marked COPY or REPLICA, sometimes very small. A removed mark leaves traces.
7. Be suspicious of bargains
Rare gold coins at low prices, 'silver' coins sold by the dozen online, and coins with impossible dates are classic warning signs.
Unsure? Upload photos of both sides and the edge for a free estimate – it flags typical signs of copies.
Frequently asked questions
Can a photo prove a coin is genuine?
No. Photos can reveal warning signs, but only an examination – ideally by a grading service or numismatist – can confirm authenticity.
What is a slabbed coin?
A coin certified by a grading service and sealed in a plastic holder with its grade. Certificates from PCGS and NGC can be checked online by their number.
Find out what your coin is worth
Upload a photo and get a free estimate in about a minute. No sign-up needed.