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 a really interesting large bright gold necklace. M in a box symbol, Italy, with what looks like 916 or 926?
How do you determine chain necklaces gold or silver content with no markings?
Hi there, you can take it to your nearest jeweler for a metal test or purchase a metal test service from us and ship to our facility! Please email us at [email protected] if you would like to move forward with us! 🙂
What does ” cc10k ” mean on my gold necklace
necklace stamped Italy 925 and 585. Is 585 the manufacturer?
Does a Pat number mean that the jewelry is real?
I have gold coloured earrings they have diamonds in them,on back is stamped it’s box with two. Letters in it can make one out its a p don’t know the other ant ideas
Stamped RSI 18k plat inside a ring what does this mean?
Hiya, I have this marking in my ring does anyone know what it means?
I have a yellow metal ring with four stones two white two red inside the ring C inside a diamond shape 18 then T
I have a jewellery piece marked PX5875 what dose it mean
What does 10k/120/NN MEAN???
What does this mean is a gold pin with a real pearl on it it looks like gold but I can be wrong…
Hello. Am resending my query as I’m not sure it has come through. I have a vintage marcasite brooch with a V followed by a degree sign. On the next line 27S and the next line E. Thank you in anticipation.
Hi – I have a small brooch which is testing for 15ct gold or higher. It has a tiny star in a circle and I wondered if this was a gold mark for small pieces or something? Many thanks
What does TGJI before 10K mean on my ring? What does TGJI stand for?
I have a pair of earrings stamped “C*C” on the clasp, but no other markings are visible. They were advertised as gold filled when I bought them but they appear more brassy than I would expect. Do they have any real gold content?
I have a pair of ear rings and the only marking on them is fwj I was told thay where 9k gold but I don’t knew if that is true now
I have a beautiful ring that’s stamped AG 925 KD. Can u tell what this means?
Mine says “orange blossom” then something that looks like a pie symbol inside a circle then “18k” and then “T16”. I’m just more so confused with the T16 and pie symbol looking thing. What do they mean?
I just purchased a semi mount engagement ring that is stamped 18k VA
What does VA mean?
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