Gold jewelry is a timeless treasure, but with so many imitations on the market, knowing how to tell if gold is real is essential. Whether you inherited a piece, bought something secondhand, or want to avoid scams, understanding gold markings and simple tests can save you money and disappointment. This guide will walk you through recognizing gold stamps, what karat numbers mean, easy home tests, and when to seek professional help.
Understanding Gold Markings and Karat Numbers
Gold jewelry usually carries small stamped marks that indicate its purity. These marks are your first clue in identifying real gold.
- Karat (k or kt) measures the purity of gold in parts out of 24. Pure gold is 24 karats.
- Common stamps you'll see include 10k, 14k, 18k, and 24k.
- The number tells you how many parts of gold are in 24 parts of the metal alloy.
For example:
- 10k gold contains 10 parts gold and 14 parts other metals (about 41.7% gold).
- 14k gold has 14 parts gold and 10 parts other metals (about 58.3% gold).
- 18k gold contains 18 parts gold and 6 parts other metals (about 75% gold).
- 24k gold is pure gold (99.9% or higher).
Higher karat numbers mean higher gold content, but also softer metal. That's why 24k gold is rare in jewelry that needs to be durable.
Other Common Gold Markings
- "GF" or "GP" means gold-filled or gold-plated, not solid gold.
- "HGE" stands for heavy gold electroplate.
- Sometimes you'll see numbers like 585 (14k), 750 (18k), or 999 (24k) — these represent purity in parts per thousand.
Simple At-Home Tests to Check Gold Authenticity
1. Visual Inspection
- Look for karat stamps inside rings, on bracelet clasps, or on pendant bails.
- Check the color: real gold has a consistent warm yellow tone. Fake gold may look too shiny, too dull, or show discoloration at edges.
- Inspect for flaking or peeling — this indicates gold plating over a base metal.
2. Magnet Test
Gold is not magnetic. Use a strong magnet and bring it close to your jewelry.
- If the piece is attracted to the magnet, it likely contains other metals and is not pure gold.
- If there is no reaction, it could be real gold — or a non-magnetic imitation metal.
This test is simple but not definitive, because some fake gold alloys are also non-magnetic.
3. Skin Test
Wear the jewelry for a day or two.
- Real gold does not tarnish or cause skin discoloration.
- If your skin turns green or black, the piece probably contains base metals.
Note: sterling silver can also cause skin discoloration in some people, so this test is more useful for ruling out cheap plated metals.
When to Seek Professional Testing
Home tests provide clues but cannot guarantee authenticity. For valuable pieces or peace of mind, professional testing is best.
Jewelers and precious metals buyers use:
- Acid tests that react differently with various karat levels
- Electronic gold testers that measure electrical conductivity
- XRF (X-ray fluorescence) machines that provide precise metal composition without damaging the piece
At Dallas Gold & Treasure Buyers, we test every item in front of you using professional-grade equipment and explain exactly what we're testing for. There's no charge for evaluations — even if you decide not to sell.
Have jewelry you're curious about? Bring it in. We'll test it, tell you what it is, and give you an offer if you're interested in selling. Walk in anytime, Monday through Sunday, 8:00 AM – 8:00 PM.