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.
Oval piece of silver with a raised cross on it on the back there is a V in a square and a x in a circle
Manufacturer/designer stamp.
I have a gold ring with ’18C RECPEND stamped inside. What does this mean, please?
Manufacturer/designer stamp.
I have just come across a ring and have no idea what it might be, I do see the letter C and numbers 085 any ideas
Manufacturer/designer stamps.
I have a small gold ring with Roman numerals 4 2 and two small dots after that, one bigger then the other, any idea?
Manufacturer/designer stamp.
I have a diamond earring that says 10k…..And a H what does the H stand for
Manufacturer/designer stamp.
I have a men’s ring stamped with what looks like a backwards 6 (could be a curl) over an M. Written like a fraction. It belonged to my FIL who has passed. I am sure it was bought in the 70’s. It has small diamonds in a square cluster. What does the stamp mean?
Manufacturer/designer stamp.
Have you seen it before?
Hi I have a vintage ring I bought at thrift store and it has what looks like a square with a tail on the inside can anyone help me identify this symbol and what it means
THANKS very much
Manufacturer/designer stamp.
I have a gold necklace and one side is stamped 14k italy and on the other side F. What does that mean?
14k indicates 58.3% gold content. The other stamps are manufacturer/designer stamps.
What does the stamp/mark of a diamond symbol mean on a piece of jewelry
Manufacturer/designer stamp.
I have a bracelet that is marked 14KON on the clasp, does this mean any thing?
14k indicates 58.3% gold content.
does the ON mean anything
My ring has 14k and then has RL59. The ring is suppose to have a 1/2 carat diamond in it.
The 14k stamp indicates 58.3% gold content. The RL59 is a manufacturer/designer stamp, it doesn’t indicate anything about your stone.
I am looking at buying a tennis bracelet from a individual she has told me her late husband bought it in the 90s for her as a gift the only makings that can be found on it are on one clasp they looks like VfY 110 I’m guessing the VfY is the maker but I can’t find anything on 110
Probably also a manufacturer/designer mark.
I have a gold chain with a s stamped on it and nothing else is this chain fake
It’s hard to tell. Your best bet is to take it to a jeweler and get it tested.
I have a ring that has 14K inside it, which I know what that means. It also has 210 stamped inside it and I am not sure what that means. It could also be 2/0. The spacing is not uniformed. Can you tell me what that number means? It has two rows of diamonds, 7 diamonds in each row.
Manufacturer/designer stamp.
I just bought a gold rose and a yellow gold rings, the stamp is something like this: “ 750 o 1A “ and a brand name with script font Louis I believe. When the seller tested the stones in top it marked diamond, when He let me do it I push harder and jumped to tanzanite, I did it again and it marked diamond…
Hi Iris,
Sorry, I’m not sure how to help you with this. Presidium testers can give varying results depending on how they’re used and they require an experienced hand in order to read accurately. Chances are, your stone is diamond, but your best bet is to take it to a legitimate jeweler or gemologist and have it appraised. Your ring stamps do not indicate anything about the stone; 750 is a stamp for 18k gold.
I have a ring that looks gold with what might be rubies that has FTH 20K stamped inside the band. What does FTH mean?
Manufacturer/designer stamp.
Hi Annabelle,
I want to buy a ring from someone but it has
a crooked 14K stamp – those it mean it’s fake?
Hi Carmen,
Not necessarily; the stamp is often done by hand, so the jeweler who stamped it probably didn’t align his stamp to the back of the ring. The best way to make sure it’s genuine is to have it tested.
My ring has 5 sc is it real gold??
Hi Terry,
That mark does not indicate gold content, so we cannot determine if your ring is gold. You may want to ask a jeweler to test it for you.
Hello, i have my wedding ring d with it lookss like 1k 10k what does this mean?
10K indicates 41.6% gold content
I have 14k gold earrings with what looks like real diamonds left to me by my mother in law, inscription reads 1011 14k. Can you tell me what the numbers mean?
Hi Mandy,
The 14k indicates 58.3% gold content. The 1011 is either a manufacturer or designer stamp.
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