What Is 375 Gold?
If someone picks up a piece of jewelry with the number 375 stamped on the inside, they have found something that most Americans have never seen before. What is 375 gold?
In the US, gold is measured by karats, so numbers such as 10K, 14K, and 18K indicate the karat content of gold jewelry. Other countries use a different system. 375 gold, which is 37.5% pure gold or 9 karat gold, is one of the most common stamping alloys in the UK and across Europe.
In a nutshell
375 is real gold at a lower purity, priced more affordably. It is great for everyday wear, due to its durability. Usually, it is more common in the UK than in the US.
What Does 375 Mean on Gold?
The number comes from the millesimal fineness system, which measures gold purity in parts per thousand rather than parts per 24 (as Americans know it, the karat scale).
So, the 375 stamp would mean 375 out of 1,000 parts are pure gold, which is 37.5%. That’s what Americans would call 9 karat gold.
Quick chart on gold purity
| Stamp | Karat | Gold Purity | Gold per 10g | Value per g* | Best For |
|---|---|---|---|---|---|
| 375 | 9K / 9ct | 37.5% | 3.75 g | Everyday rings & chains | |
| 585 | 14K | 58.5% | 5.85 g | Mainstream fine jewelry | |
| 750 | 18K | 75.0% | 7.50 g | Higher-end fine jewelry | |
| 916 | 22K | 91.6% | 9.16 g | Investment jewelry & cultural pieces | |
| 999 | 24K | 99.9% | 9.99 g | Investment bars & high-purity jewelry |
Is 375 Gold Real?
375 gold is definitely real gold. Sure, 375 is lower-purity, but that doesn’t mean it’s fake.
375 gold is recognized under UK hallmarking law, where 9K is the minimum fineness for an item to be marketed and sold as gold. 375 is also considered valid gold by the Goldsmiths’ Company Assay Office in the UK, which independently tests and certifies precious metals.
An important distinction, however, is that a simple “375” stamp is a manufacturer’s claim, not independently verified proof. A full UK hallmark (which is a fineness mark, a sponsor’s mark, and an assay office mark) is more valuable because it means the item was tested by an independent body. A bare fineness stamp only indicates the purity claimed by the maker.
Is 375 Gold Good Quality?
Whether 375 gold is good quality really depends on what someone is using it for.
375 gold is not a luxury alloy but a practical one. Only 37.5% of the metal is gold; the rest is copper, silver, zinc, or other metals. This means the piece ends up tougher and more resistant to everyday wear & tear than higher-karat gold. If someone is wearing a ring every day and doesn’t want to worry about it, a 9K ring will scratch less easily than an 18K one, which can make a big difference in appearance.
The more gold, the warmer and more saturated the yellow, creating what most people associate with fine jewelry. At 375, the yellow tone is softer and can be a fair bit paler.
Often, white gold versions of 375 use nickel-based bleaching systems and rhodium plating to achieve a bright white finish, so they’re not automatically hypoallergenic (for anyone with a nickel sensitivity, it might be best to get higher-purity gold jewelry).
All in all, 375 is good for everyday jewelry but is not considered premium.
Where Is 375 Gold Commonly Found?
9K gold has historically formed a large part of the UK jewelry trade. Plain gold bands, chains, bracelets, stud earrings, and pendants are all common in 375. It is also the alloy behind much vintage and heirloom British jewelry, so those sorting through an inherited collection are likely to see it.
In the US, it’s less common, though the Federal Trade Commission recognizes 9 Karat gold as a valid option when the fineness is correctly disclosed alongside it.
375 is also found in white gold items. If a piece has a 375 stamp and is silver-colored, it is not sterling silver. Sterling silver has purity marks such as 925. Instead, it is white gold, often rhodium-plated for a bright finish.
How to Find a 375 Gold Stamp
For rings, check the inside of the band; for chains and bracelets, the clasp is the most common location. The mark is also usually found on the bail of a pendant (the small loop through which the chain threads).
Stamps are small and sometimes faint, especially on older pieces, so a double-check may be necessary if not found right away.
The mark may be simply “375” or may include a maker’s cartouche (a small geometric symbol with the manufacturer’s initials). Instead of a single number, it is common to see a set of marks on UK-hallmarked pieces. Imported items from Europe may also be stamped with a mark such as “375 Italy.”
It should be noted that a stamp is a statement of the purity content from the manufacturer and does not prove authenticity.
Is the 375 Stamp Ever Fake?
375 stamps can be faked because they can easily be applied to plated items. Signs of a fake stamp include color wearing through at high-contact points, revealing a copper- or silver-toned metal underneath; a stamp that looks shallow or poorly struck; and an unusual weight for the size of the piece.
How Much Is 375 Gold Worth?
Finding the value of 375 gold is straightforward. Multiply the weight in grams by 0.375 (37.5%), then multiply that amount by the current spot price of gold per gram.
Gold spot prices also change daily, so any calculation made should use a live price. Check live prices at the World Gold Council or the London Bullion Market Association, or use a gold calculator to do the math for you.
Is 375 Gold Worth Anything and Should You Sell It?
There is definitely genuine value with 375 gold pieces. Broken clasps and a single earring will still contain real gold, which buyers will pay for. Gold is still gold, no matter the condition of the jewelry.
That said, 375 gold still has less gold than 585 or 750, meaning its worth will be lower too.
At current spot prices, a gram of 375 gold has a gold content value of about $56, compared with about $88 for 14K and $113 for 18K.
A 375 item could be worth more than its melt value if it has design appeal, gemstones, or a recognizable designer’s mark, but in general, for generic or damaged pieces, the melt value is the best estimate of what a buyer would probably pay.
How to Get the Best Price for 375 Gold
The most important thing anyone can do to get the best price is to weigh their pieces, note the purity mark, and calculate the gold content using the current spot price. This can provide a floor to compare against, which leads to the second-most-important tip.
Compare, compare, compare. Do not accept the first offer, especially at a jewelry store or pawn shop. Check with multiple buyers to see who offers the best price for 375 gold.
Lastly, only sell to those who offer transparent pricing. Those who want to skip the headache of finding reputable gold buyers may consider Alloy.
Alloy Buys 375 Gold
If you’re looking to sell 375, the Alloy Market is here to help. We offer a simple, trusted way to sell gold from your home. To start, request a free evaluation kit. It ships directly to you and includes a free, postage-paid parcel to pack your items. We’ll cover insurance and tracking to keep your items safe in transit.
If you live in the Newtown, PA area, you can request a free in-person evaluation. Have questions or want an up-front estimate? If you know your items’ details, you can use our Gold Calculator for an instant estimate. If you aren’t sure, you can reach out to one of our Alloy Advisors with your questions. They’re happy to help.
Once your items are evaluated, we’ll send you a detailed, itemized purchase offer. When you accept, we’ll initiate payment the same day. If you decline, we’ll send your items back at no additional cost.
Pieces in resale-ready condition may be eligible for placement on our marketplace. If your item sells, we’ll send you an automatic payment of 25% of the profit with our Double Pay program. You get paid twice! Gain the upside of the marketplace without all the work.
Join the thousands of happy customers who have made Alloy their go-to precious metal dealer.
