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 silver ring. The markings in it are T H and then a diamond sign. The stone is black diamond in shape and appears to have small diamonds around it.. what do the markings mean please? It is an antique ring
Most likely manufacturer/designer stamps.
I have a gold ring with 3 small diamonds. The inside has only the stamp WBF. Any idea what the WBF could stand for?
It’s the manufacturer/designer’s stamp
When the jeweler sized my ring why did they not replace the stamp?
Hi there, that may depend on what stamp they removed in the process of sizing. If the jeweler removed the manufacturer/designer’s stamp in the process, there is no way for them to reapply that stamp as it is unique to the manufacturer/designer who made it. If they removed and did not replace the karat stamp, this is due to the fact that it is not a required procedure unless if specifically requested by the client.
Hi.. i have what looks to be a 1/2 diamond stud. The backing of the stud says 18k. The setting in which the diamond sits in has a marking of S&D on it. What does that mean?
Thank you!
Hi Casey, the 18k indicates 75% gold content. S&D may be the trademark of a company called Steele and Dolphin.
I have a fish pin stamped 80k on back. What does that mean?
Hi Elizabeth, it probably doesn’t indicate anything about the metal content. Most likely, it’s a designer mark.
I have a charm that has 14k and then 14vk. Any idea what that means?
Hi Sandra, 14k indicates 58.3% gold content.
I have a ring that says 18 kt hgex3
Hi Linda, 18k indicates 75% gold content.
Brooch with MET.
Blue stone / maybe glass
Metal ,. Bronze copper color
Older style hook closure
Only thing I can find on tbe internet about MET is a muesum ,. [email protected]
Hi there, it could be produced for the Metropolitan Museum of Art, as they do sell jewelry. This stamp is also common in vintage jewelry from areas like Poland and other European countries to indicate low-quality silver.
I have an 18 carat gold patterned wedding band bought new in Samuels in 1976. The ring has the word LUCKY engraved inside. Does this mean anything?
This stamp is common to items from Samuel’s from 1960s to 1970s. It’s most likely the stamp of the manufacturer that Samuel’s was using at the time.
i have a necklace and earring that has a JF 14k on it, can you tell me what it means
Hi Hyerin,
The JF is the manufacturer’s stamp, the 14k indicates 58.3% gold content
I have a gold looking necklace , stamped AW.S what is that for?
Hi Dana, it’s the manufacturer/designer’s stamp.
I have a gold bracelet that is stamped innv 10K. What does that mean?
Hi there,
10k indicates 41.6% gold content.
I have an Diamond earring that is in a silver setting but it is stamped 10k NY. Do you know what it means!
Hi Angela,
10k indicates 41.6% gold content.
I’ve got diamond ring with 925 inside stamped than on other side inside it has CN and box with box inside that box and a d is in that
Hi Tracy,
The 925 indicates sterling silver. The other marks are designer marks.
I have a pair of diamond stud earrings. On the post it has a curved line and 14k. What does that line mean?
Hi Tanya,
14k indicates 58.3% gold content. The line is probably the designer/manufacturer mark.
What’s Pm means in silver sing with gem stone?
Hi Alaina,
This stamp is probably a manufacturer/designer stamp. It doesn’t indicate anything about the metal.
10KT Italy on one side and TOB on the other mean
Hi Marie,
The 10k indicates 41.6% gold content and the other stamps are designer/manufacturer origin stamps.
Hi I have a vintage bracelet very clearly stamped 14kt H2 inside of it..what does this mean?
14k indicates 58.3% gold content, while H2 is the manufacturer’s stamp.
i have a white gold pendant marked 10k D. any ideas?
10k indicates 41.6% gold content, while D is the manufacturer’s stamp.
i have a gold rink marked 14k JTS. any ideas??
14k indicates 58.3% gold content, while JTS is the manufacturer’s stamp.
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