How to Tell if a Cuban Link Chain Is Real Gold

Short answer: Start with the karat stamp near the clasp (10K, 14K, 417 or 585), then check weight, finish and wear signs. No home test is conclusive on its own. The only reliable confirmation is testing by a jeweler using an acid test or an XRF analyzer, plus buying from a seller that names the metal and karat of every piece.

Key takeaways

• A karat stamp is the first check, but stamps can be faked, so do not rely on one alone.
• Solid gold chains feel heavy for their size, and hollow or plated chains often feel light.
• The magnet test only rules out some fakes. Gold is not magnetic, but many fakes are not magnetic either.
• Color that flakes, rubs off or turns skin green points to plating or a base metal.
• Ask a jeweler to test the chain. It is quick and it is the only conclusive route.

Step 1: Read the hallmark

Real gold jewelry is normally stamped with its purity. Look closely at the clasp, the small tag next to the clasp, or the last link. Use a loupe or phone camera zoom.

Stamp	What it means
10K or 417	10 karat, 41.7% gold
14K or 585	14 karat, 58.3% gold
18K or 750	18 karat, 75% gold
.925 or 925 or STER	Sterling silver
GP, GEP, RGP, HGE	Gold plated or electroplate (not solid gold)
GF	Gold filled (a thicker gold layer over base metal, not solid)

Also look for a maker's mark. Clean, crisp, evenly struck letters are a good sign. Blurry, uneven or oddly shaped stamps deserve caution. A stamp does not prove a chain is real, because stamps can be added to fake pieces.

Step 2: Check the weight and build

Cuban link chains in solid gold are dense. A solid 14K chain feels noticeably heavier than a plated or hollow chain of the same width and length. If a wide chain feels surprisingly light, it may be hollow. Hollow gold chains exist and are sold legitimately as such, but they should be described that way. Check the listing for a stated weight in grams and compare it to the width and length.

Look at how the links sit. Real Cuban link has tightly connected, evenly shaped links that lie flat and curve smoothly. Gaps, uneven links, rough solder points or a stiff, kinked chain are signs of poor construction.

Step 3: Inspect the clasp

A solid gold chain normally has a clasp of matching quality. Heavy Cuban links often use a box clasp with a safety latch or a strong lobster clasp. A flimsy clasp, a mismatched color between clasp and chain, or a clasp that is not stamped should raise questions.

Step 4: Look for wear signs

Plated chains wear through. Check for:

• Flaking or peeling of the gold color
• A different color showing at the edges of links or at the clasp (silver, copper or gray)
• Skin turning green or black after wear. This is a hint of base metal, but it is not conclusive either way, because skin chemistry varies.

Step 5: Know what the home tests can and cannot do

• Magnet test: Gold is not magnetic. If your chain sticks to a strong magnet, it is not solid gold. If it does not stick, that proves little, because many fakes use non-magnetic metals.
• Acid kits: Acid testing is accurate in the hands of a trained person, but the acid can damage some finishes. Leave it to a jeweler.

Step 6: Get it tested

A jeweler can test the chain with a touchstone and acid, or with an XRF (X-ray fluorescence) analyzer, which reads the metals in the piece without damaging it. If you are buying a chain, ask the seller to name the metal and karat, and ask what the stamp reads. Keep your purchase records.

Real gold vs gold-bonded, plated and sterling

Not every non-solid chain is a fake. Gold-bonded, gold-plated and sterling silver chains are real products when labeled honestly. The problem is when a chain is sold as solid gold and is not. Read our guide on gold-bonded vs solid gold to see how they differ, and our 10K vs 14K guide to understand karat.

Buying from a seller you can check

Ask the seller for the metal, karat, stamp location and weight in grams.

My Jewelry Connect is a veteran-owned Miami jewelry store, owned by Anthony, a United States Marine Corps veteran. We buy direct from the Miami jewelry district. Our solid gold chains are listed with their metal. You can also browse Cuban link chains and gold-bonded jewelry, which we label separately from solid gold. If you want help with any piece, call 305-522-8331.

FAQ

Does real gold turn your skin green? Pure gold does not. Skin discoloration usually comes from the base metals in an alloy or plating, so it can hint at a non-solid piece, but some people react to the alloy in real gold as well. It is not a conclusive test.

Can a real gold chain be non-magnetic and still be fake? Yes. Gold is not magnetic, so passing a magnet test only rules out ferrous fakes. Many counterfeit pieces use non-magnetic metals such as brass.

Is a stamp enough to prove a chain is real? No. Stamps can be added to fake pieces. Use the stamp together with weight, finish and a test by a jeweler.

What is the most reliable way to confirm gold? An acid test or an XRF analyzer used by a jeweler or a gold buyer.