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.
What does 14k ho mean on a gold bracket
I have a silver coloured ring with a hallmark of maybe a heart and 2 dots next to it. The ring was quite misshaped my dad tried to straighten it and it broke . The metal is very soft
Hi there, could you please provide a picture of the ring? We may be able to help reshape this for you!
I have a bracelet that has a N and the roman Numeral 2 on it can someone please tell me what they both mean?
I have a full gold looking bracelet with a small 916 engraved and below it is a TA and then there’s a a circle around the whole thing what does the TA stand for?
Can anyone explain this stamp? It’s an XL stamp, with some sort of stamp next to it.
Could anyone please tell me what D26 on white or silver jewlery mean please
What does 14K GOC mean?
I have a ring and the only stamp on it is ©ak and about a quarter of the rings circumfrance away towards the right of it is a 7. I believe it’s a size 7 ring but it could be smaller as it fits more like a 6 3/4. What could this mean?
I have a pair of earrings my Mother gave e they have 375CR stamped on the under side what does this mean
Hi there. I have a English silver bangle bracelet engraved and on the inside the letters C.T. are there. What does it mean please
What does 1.G.C mean on a ring?
I have a diamond necklace real diamonds but not sure what Cu with heart is
Cu means that your piece is made with copper!
What does Cu with a heart❤ stand for
I have a diamond and pink ice ring that has CHINA and JDCZ225 stamped in it. What does it mean
My. dear friend of 37 years who passed recently left me her Gold ring set with .2 diamonds and a
ruby in the center , the.gold is stamped 55360 what does it mean?
She got the ring from her husband who was from Pakistan .
I know. Gold from there is 22 k but these Stones are real so I was told
and.22 K is too soft to hold the diamonds ar Ruby . So what does the mark mean
I’m curious
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I HAVE A RING STAMPED A.I.S CO ON THE INSIDE ALONG WITH 14K IT HAS TESTED POSITIVE FOR DIAMONDS ON THE OUTSIDE AND SOME TYPE OF PURPLE STONE IN THE BIG MIDDLE SETTING
14k with D_
I got a ring with 14k the looks like a D with a line under it
I have a ring stamped 950 . another stamp of a Star and the letters AL followed by some numbers. What does that mean?
I have a necklace with a tag that has a Js on it, cannot find who this is? Help?
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