Many of us have seen the small numbers or letters engraved inside a ring band or near the clasp of a piece of jewelry that we own. But how many of us understand what information those stamps are actually giving us?
In this post, we’ll walk through the different stamps, what they mean, and what you need to know about stamping laws to ensure you’re getting the most accurate information about your jewelry. Let’s start with the basics:
- 10K, 14K, 18K, 24K, etc – if this is the ONLY stamp on the piece, it is telling you first and foremost that the piece is solid gold and secondly, the karat fineness of the gold. For example, let’s look at 14K. 14 out of 24 particles in the metal are pure gold. The others can be a mix of elements including palladium, copper, etc. These additional elements are what determine the specific color of the gold (we’ll talk about this in an upcoming post).
750 stamp on jewelry means 18k Gold - 417, 585, or 750 – this is just another way of telling us the gold content. However, instead of referring to how many parts out of 24 are pure gold, this number is now out of 1,000. So for 10K gold jewelry, 417 out of 1,000 parts are pure gold. For 14K gold jewelry, 585 parts out of 1,000 are pure gold. So when you see 750 that means 18K gold jewelry because the metal is made of 750 parts per 1,000 of pure gold.
- 900, 900PT, PT900, 950, 950PT, PT950 – all of these stamps designate that the piece is made of one of the two most common platinum alloys. 900, 900PT, or PT 900 all signify that the metal used is 900 parts per 1,000 pure platinum, while 950, 950PT, and PT950 denote 950 parts per 1,000 are pure platinum.
- 925 – a piece with this stamp is made of sterling silver. Legally, to be considered sterling silver a piece has to consist of 92.5% pure silver, with only 7.5% other elements mixed in.
- GP – pieces with this stamp have been plated with gold, but have another metal underneath. It almost always has the karat fineness of the plating listed, i.e. 18K GP.
- HGE – this is the abbreviation for high grade electroplate, which is another way of denoting that the jewelry you are looking at is not solid gold. These pieces also generally display the karat fineness of the gold.
- GF – this stands for gold-filled, which is a term that means a thin layer of gold was bonded to a base metal to make this piece.
So now that we have the basic stamp meanings down, let’s go through some of the most frequently asked questions that we hear from customers:
There’s another symbol next to the metal content stamp that isn’t on your list. What does that mean?
Most likely, the stamp you are seeing here is the manufacturer’s trademark or the trademark of the retailer selling the piece. This is legally required if the item is stamped and serves as a guarantee of sorts that the manufacturer/retailer vouches for the accuracy of the stamp on the metal.
My jewelry piece isn’t stamped at all. Does this mean it’s not made of precious metal?
Not necessarily. The legal guidelines on stamping don’t require all pieces made of precious metal to be stamped. However, they do require the manufacturer or retailer to disclose any precious metal content. This could be via discussion in the store upon purchase, on a tag attached to the piece, or on the receipt for the product itself.
The clasp/closure/earring backs on my piece are stamped, but the rest of the item is not. Does that mean the whole thing is made of precious metal?
Again, not necessarily. Sometimes the clasp of a piece is made of a different metal than the chain, so definitely confirm with the store clerk or jeweler that the entire item is made of the metal from the stamping. Likewise, earring backs may have been accidentally swapped and may not be made of the same metal as the rest of the earrings, especially the posts, so double checking is always best.
My piece has a name/date engraved on it. Is this the designer or year that the piece was made?
For well-known brands and designers, this can be the case, but it isn’t necessarily a correct assumption. For example, Tiffany & Co. has several Paloma Picasso designs that would be engraved as such and may include the date. However, it could also be that the piece is vintage or estate and was engraved with the previous owner’s name, anniversary, etc.
What other questions do you have about jewelry stamp meanings?
Community Discussion
Questions, experiences, and expert answers from the QJR community.
I have an opal ring, with diamonds all around. Inside there is one inscription 14K. Also just before that, the # 1420. What does the # signify?
The “14K” stamp indicates that your opal ring is made of 14-karat gold. The “#1420” is most likely a manufacturing or style number used by the jeweler or manufacturer to identify the specific design or model of the ring. This number helps distinguish the piece within their production line or catalog. It doesn’t usually indicate anything about the gold or gemstones but helps track the design or order.
925 MC 7H
VERY curious on what this stamp means
The “925” stamp indicates that the piece is made of sterling silver, which is 92.5% pure silver. “MC” is likely the maker’s mark, identifying the manufacturer or jeweler who crafted the piece. The “7H” could be a production code, batch number, or model identifier, used internally by the manufacturer. Together, these marks help identify the material, origin, and possibly the specific design of the piece.
I have an old chain that says 1-10 D & C on the spring clasp, does that mean 10 k?
The “1-10 D & C” marking on your chain’s clasp likely indicates that it is gold-filled rather than solid gold. Specifically, “1-10” means that the piece is made of 1/10th gold by weight, with a layer of gold bonded to a base metal. “D & C” is most likely the maker’s mark identifying the manufacturer. This does not indicate 10k gold, but rather that the chain is gold-filled with 10% gold content.
I Have A Ring That’s 14K White Gold & Natural Gemstone & Diamond Ring With A Stamp OD & On The Other Inner Side Of The Band Is 14K ! Does Anyone Know What OD Initials Stand For?
The “OD” stamp on your ring is likely the maker’s mark, identifying the jeweler or company that crafted the piece. These marks are used to trace the origin of jewelry but can vary widely between manufacturers. If you’re curious about the specific brand or jeweler, you may avail our jewelry appraisal service! 🙂
Can anyone please give me some insight as to what these four digits stamped on my anniversary band mean? 6748
Thank you
The four-digit number “6748” stamped on your anniversary band is most likely a style, model, or inventory number used by the manufacturer to identify the specific design of the ring. This helps the jeweler track or catalog the piece within their collection or production line. It doesn’t relate to the metal or gemstone content but serves as an internal reference for the jeweler or retailer. 🙂
I have a ring that looks vintage and has js stamped on the inside,what does that mean ??
The “JS” stamp inside a ring often indicates the maker or designer, which can vary based on the specific jewelry piece. It might refer to a specific jeweler or company that produces vintage-style jewelry. Sometimes, “JS” could also denote a particular type of metal or alloy used. To get more precise information, you might want to check our jewelry appraisal service 🙂 https://quickjewelryrepairs.com/repair/jewelry-appraisal/
I know the ring is CZ but what is the other stamping?
I have a old ring it looks real i think it’s gold but the only stamp it has is • 4 8 on it what does this mean
Is this a real gold ring
GRD Meaning inside ring Cartier love ring
I have a ring stamped 10k with a jagged S. What does the S mean? It looks exactly like this.
Hello. I have a necklace with “AT” stamped on the clasp. Anyone know what this might mean or what it may stand for?
My ring has an “M” or maybe “W” what does that mean,no numbers,now circle l,just a letter?
Hi I have a ring that has f China stamped on it what does it mean?
Good afternoon
There is a stamp on the gold ring
I will be glad to your help
I have an old ring with these stamps what does it mean or what time frame is it from? Any details would be great.
I have a small jade ring which I thought was in 18k. However the only marking I can find on it is 8/5. I believe it came from abroad. Can you help at all?
Regards
Good day,
I have a ring stamped 1588 PLAT 18CT
What does that mean?
Kind regards
Lizel
Hi Lizel! 18CT indicates a stated 18-carat gold component, while PLAT commonly refers to platinum. Some pieces combine the two metals, but the full marks and construction need examination before confirming that for your ring. 1588 is not enough on its own to date it. If you need a value assessment, our appraisal service is here: https://quickjewelryrepairs.com/repair/jewelry-appraisal/.
I have a gold tone ring that has the letters MEL on the inside,do you happen to know what that means? Thank you
i don’t know what stamp
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