You’re standing over your dresser, holding a necklace your aunt gave you in 1997. It looks gold. It feels heavy enough. But is it actually gold, or is it a $4 chain with a thin yellow coating?
This question matters a lot more now than it did five years ago. Gold is trading around $4,300 to $4,400 per ounce as of early 2026. That’s roughly three and a half times what it was in 2015. A solid 14K gold chain that might have been worth $300 back then could easily be worth $900 to $1,200 today. But a gold-plated chain? Maybe a dollar or two for the base metal, if that.
I’ve been buying precious metals for almost 20 years now, first in Houston and then in San Francisco where I opened Bay Area Gold & Silver Buyers around 2010. The single most common situation I see is someone walking in with a bag of jewelry, half convinced it’s all fake, half hoping something in there is real. And the truth is, most people have no idea how to tell the difference. That’s what this post is for.
What “real gold” actually means
Let’s get the basics out of the way. When someone says “real gold,” they usually mean solid gold. That doesn’t mean pure gold. Pure gold (24 karat) is actually too soft for most jewelry. It bends, scratches, and deforms easily. So jewelers mix gold with other metals like copper, silver, nickel, or zinc to make it harder and more durable. That mixture is called an alloy.
The karat number tells you what percentage of the alloy is actually gold.
24K is 99.9% pure gold. You’ll see this mostly in bars, some coins, and jewelry from certain parts of Asia and the Middle East.
18K is 75% gold. Higher-end jewelry, engagement rings, and pieces from European and Middle Eastern markets are often 18K.
14K is 58.3% gold. This is the most common karat in American jewelry. If you bought a ring or chain at a US jewelry store in the last 40 years, there’s a good chance it’s 14K.
10K is 41.7% gold. This is the legal minimum to be called “gold” in the United States. It’s common in class rings, basic chains, and affordable jewelry.
So a 14K gold ring is real gold, even though it’s only about 58% gold by weight. The rest is other metals. And that 58% is what determines its value when you bring it to a buyer like us.
The three imposters: gold-plated, gold-filled, and gold vermeil
Here’s where people get tripped up. There are several types of jewelry that look like gold but contain very little actual gold content.
Gold-plated (GP or GEP) means a microscopically thin layer of gold has been applied over a base metal, usually brass or copper. We’re talking about a coating measured in microns, which is millionths of a meter. The gold content in a plated piece is essentially zero from a resale perspective. This is the most common disappointment I see at the counter. Someone brings in a beautiful-looking necklace, and the XRF analyzer shows it’s brass with a gold coating thinner than a soap bubble.
Gold-filled (GF) is a step up. It has a thicker layer of gold bonded to a base metal under heat and pressure. By law, gold-filled items must contain at least 5% gold by weight. That’s more than plating, but still far less than solid gold. A heavy gold-filled bracelet might have some value, but nowhere near what a solid gold piece of the same weight would bring.
Gold vermeil is sterling silver coated with a thick layer of gold, at least 2.5 microns. It’s more common in designer fashion jewelry. The silver underneath has some value, but the gold layer is too thin to matter much.
The key point is this: gold-plated and gold-filled items look nearly identical to solid gold when they’re new. After years of wear, plated items might show the base metal underneath where the coating has worn off. But a well-preserved plated piece can fool almost anyone just by looking at it.
Check the stamps first
The fastest way to get a clue about what you’re holding is to look for stamps or hallmarks on the piece. You’ll usually find them on the clasp of a necklace, the inner band of a ring, or the back of a pendant. Grab a magnifying glass because these stamps are small.
Here’s what to look for.
10K, 14K, 18K, or 24K means solid gold at that karat. Sometimes you’ll see it written as 417 (10K), 585 (14K), 750 (18K), or 999 (24K). Those numbers represent the gold purity in parts per thousand.
GP means gold plated. Sometimes written as GEP (gold electroplated) or HGE (heavy gold electroplate). All of these mean the same thing: thin gold coating over a base metal.
GF means gold-filled. You might see “1/20 14K GF” which means the piece is 1/20th 14K gold by weight.
925 means sterling silver. If a piece is stamped 925 with no gold karat marking, it’s silver, not gold, even if it looks gold-colored. It might be gold vermeil (silver with gold plating).
No stamp at all doesn’t necessarily mean it’s fake. Older pieces, handmade jewelry, and items from certain countries may not have stamps. But it does mean you need to test it to know for sure.
One thing I want to be clear about: stamps can be misleading. I’ve seen gold-plated items stamped 14K, and I’ve seen unmarked items test as 18K gold. Stamps are a starting point, not a final answer. That’s why we use a Niton XRF metal analyzer at both our San Francisco and Houston locations. It reads the actual elemental composition of the metal, not just what someone stamped on it.
Home tests that actually work (and ones that don’t)
Let me walk through the tests you can do at home. Some of these are useful. Some are popular on the internet but basically useless.
The magnet test (somewhat useful). Gold is not magnetic. If you hold a strong magnet (a refrigerator magnet won’t cut it, you need a neodymium magnet) near your jewelry and it sticks firmly, it’s not gold. But here’s the catch: a lot of base metals used in plated jewelry are also not magnetic. Brass and copper don’t stick to magnets either. So passing the magnet test doesn’t prove something is gold. It only proves it’s not made of iron or steel. The magnet test can rule things out, but it can’t rule things in.
The weight and density test (useful if you’re patient). Gold is dense. Really dense. A solid gold piece will feel noticeably heavier than a plated piece of the same size. You can actually measure this if you have a kitchen scale and a cup of water. Weigh the piece dry, then weigh it submerged in water (hang it from a string on the scale). Divide the dry weight by the difference between dry and submerged weights. Pure gold has a density of 19.3 grams per cubic centimeter. 14K gold runs about 12.9 to 14.6 depending on the alloy. If you get a number well below 10, it’s probably not solid gold.
The ceramic plate test (somewhat useful). Drag the piece across an unglazed ceramic plate (the back of a bathroom tile works). Gold leaves a gold-colored streak. Most base metals leave a dark or black streak. This test can scratch your jewelry though, so don’t do it on anything you care about keeping in good condition.
The nitric acid test (accurate but risky). This is what professional buyers used before XRF technology became available. You scratch the item on a testing stone, then apply nitric acid to the streak. Real gold won’t react. Base metals will dissolve or change color. Different acid concentrations test for different karats. I don’t recommend doing this at home because nitric acid is dangerous and you can damage your jewelry. But if you see a gold buyer using acid tests, that’s what they’re doing.
The “bite test” (useless, please don’t). You see this in old movies. Pure 24K gold is soft enough to leave a tooth mark. But nobody wears 24K jewelry, and biting a 14K ring is just going to hurt your teeth. Skip this one entirely.
The vinegar test (mostly useless). Some websites suggest soaking jewelry in vinegar. Real gold won’t change color in vinegar, but neither will many base metals. This test is too unreliable to mean much.
The skin discoloration test (circumstantial). Some people notice that cheap jewelry leaves green or black marks on their skin. This happens because base metals like copper react with sweat and oils. Gold doesn’t do this. But some people react to the alloy metals in real 10K or 14K gold too, especially if the alloy contains nickel. So skin discoloration suggests something, but it doesn’t prove anything.
What a professional test looks like
When you bring items to Bay Area Gold & Silver Buyers, we use a Niton XRF (X-ray fluorescence) metal analyzer. This is the same technology used in labs and refineries. The device shoots a focused beam of X-rays at the metal, and the atoms in the metal emit their own characteristic X-rays back. A detector reads those emissions and identifies exactly which elements are present and in what percentages.
The XRF tells us if a piece is gold, what karat it is, and whether there’s anything unusual about the alloy. The whole test takes about 30 seconds per piece, and we do it right in front of you. Your items never leave your sight. Nothing goes to a back room.
This matters because it eliminates all guesswork. I’ve had people bring in pieces they were sure were fake that turned out to be 18K gold worth hundreds of dollars. And I’ve had people bring in “gold” chains their uncle swore were solid gold that turned out to be brass. The XRF doesn’t have opinions. It just reads the metal.
The evaluation is always free, whether you end up selling or not. About 40% of our customers walk in without an appointment, and 60% book ahead of time. Either way works.
Why this matters more in 2026 than it did five years ago
Here are some real numbers. In January 2020, gold was trading around $1,550 per ounce. In March 2026, it’s around $4,300 to $4,400 per ounce. That’s roughly a 180% increase.
What does that mean in terms of actual jewelry?
A 14K gold chain weighing 30 grams would have been worth roughly $550 to $600 in early 2020 based on the gold content alone. That same chain, at today’s prices, is worth approximately $1,500 to $1,700. Same chain. Same weight. Same karat. Just a different gold price.
A pair of 18K gold earrings weighing 8 grams would have been worth maybe $240 in 2020. Today they’re worth about $650.
These aren’t hypothetical numbers. I see these conversations at our San Francisco and Houston locations every single day. Someone comes in with jewelry they assumed was worth $50 or $100, and the actual value is five or ten times that. The look on their face when they hear the offer is honestly the best part of this job. It brings me real joy, and I’m not just saying that.
A woman came into our office not long ago with a collection of jewelry from her late father-in-law. She was apologizing before she even sat down, saying she was sorry for wasting my time because she was sure none of it was real. The relationship with her father-in-law had been difficult, and she figured he wouldn’t have left her anything valuable. We tested everything. Over 90% of it was authentic. The total value was enough to pay for braces for three of her children. She broke down crying right there. Half the tears were because of the money. The other half were because she realized her father-in-law cared about her more than she ever knew.
That’s why I always tell people: bring everything in. Don’t assume something is fake just because it looks old or you got it from someone you didn’t expect generosity from. Let us test it. The evaluation costs you nothing, and the answer might surprise you.
What to do next
If you want to check your jewelry at home, start with the stamps. Look for karat markings with a magnifying glass. Do the magnet test to rule out the obvious fakes. Try the weight test if you have a scale and some patience.
But the real answer is to bring your pieces in for professional testing. We’re at 780 Sutter Street in San Francisco’s Union Square area and at 2635 Gessner Road in Houston. Walk-ins are welcome Monday through Saturday, 10 to 5, or you can book an appointment online for faster service.
We test everything with our XRF analyzer right in front of you, explain exactly what each piece is, and give you an offer based on the current spot price, the weight, and the purity. The whole process usually takes about 10 to 15 minutes. No pressure. If you don’t like the offer, you take your stuff and go.
And honestly, I’d encourage you to get quotes from other buyers too. We say this right on our website: always shop around and get a second opinion. We’re confident enough in what we pay to tell you that.
