Jewelry Hallmarks and Stamps: How to Read What's on Your Jewelry

Most people never look closely at the tiny stamps pressed into their jewelry, at least not until a question comes up. Is this piece solid gold or plated? Is the silver real? Who actually made it? The answers are pressed right into the metal, in the form of jewelry hallmarks, and reading them takes only a few minutes to learn.

These small marks sit in quiet places: the inside of a clasp, the back of a pendant, the post of an earring. Once you know where to look and what the numbers and letters mean, a piece starts to tell you its story, its metal, its maker, and sometimes its age.

At The Gilded Horse, every piece we handcraft carries proper marks, because you should know exactly what you are wearing. This guide walks through how to read them with confidence, from the 925 stamp on sterling silver to the karat stamp on solid gold.

What Jewelry Hallmarks Actually Tell You

A hallmark is a small stamp that records something true about a jewelry piece. The hallmark meaning usually comes down to a few facts: what the metal is, how pure it is, and who made it. Some marks also show where a piece was tested and in what year.

Read together, these are authenticity marks in the truest sense. A purity number, a maker's symbol, and an official testing mark together form a strong signal that a piece is genuine, because faking one stamp is easy while faking the full set is not. Careful buyers learn to read the whole picture rather than trusting a single number. That knowledge has practical value too, from insuring a jewelry piece to passing it down or understanding its worth later. The marks are not decoration. They are a quiet record of quality, the same standard we hold ourselves to.

Where to Find the Marks, and How to See Them

On necklaces and bracelets, the marks sit on or near the clasp, or on the small tag attached beside it. On pendants, look on the bail or the back; on earrings, check the post or the back. On rings, they sit inside the ring band. Jewelers place them in these discreet areas so they will not interfere with how a piece looks, so you usually have to hunt a little.

Because the stamps are tiny, the right tool changes everything. A jeweler's loupe at 10x magnification is the industry standard, and a simple magnifying glass works well for a first look. Good light matters as much as magnification, so use daylight or a bright lamp and rest your hands to keep the piece steady. Worn or older marks can take patience to read.

How to Read Jewelry Stamps: Metal and Purity

Once you find the marks, reading them is mostly about numbers. Learning how to read jewelry stamps starts with metal purity stamps, which tell you the metal type and how much precious metal a piece holds. In other words, they record the metal content, the share of pure gold or silver inside the piece.

Gold is measured in karats or in parts per thousand, two systems that say the same thing. Gold purity marks like 585 and 750 line up with the karat marks 14k and 18k: 585 means a gold content of 58.5 percent, and 750 means 75 percent. A piece of solid gold carries one of these on its own. A GP or GF stamp means the gold sits on the surface only, gold plated or gold filled over a base metal rather than pure gold throughout. Silver items follow their own short code, and platinum, when you see it, is usually stamped PT or PLAT. At the high end, a 999 mark signals 24k, almost pure gold.

One more thing worth knowing: a missing stamp does not always mean a piece is fake. Older jewelry made before modern marking, handmade jewelry items, and pieces whose marks have simply worn away can all read as blank. When a mark is absent or unclear, that is the moment to bring a piece to a jeweler rather than guess.

What the 925 Stamp Means

The most common silver mark you will see is 925. The 925 stamp meaning is simple: the piece is sterling silver, which is 92.5 percent pure silver, usually mixed with a little copper for strength. A sterling silver stamp may also read STERLING, or 925 followed by a maker's letters. Our Circle Medallion sterling silver necklace carries this mark, so you can confirm the metal at a glance.

What a 14k Gold Stamp Means

For gold, the most common mark in the United States is 14k. A 14k gold stamp tells you the metal is 58.5 percent pure gold, balanced with other metals for durability you can wear every day. You may also see it written as 585. The solid 14k gold in pieces like the Classic Anchored Pendant carries this stamp, the same standard used across fine jewelry.

Maker's Marks, Assay Marks, and Date Letters

Beyond purity, a few marks point to people and places. A maker's mark identifies the manufacturer or designer behind a piece, usually as initials stamped into the metal, a symbol, or a name. It works like a signature, and a recognizable one can significantly increase a jewelry piece's value.

In many countries with formal systems, an official assay office mark shows where a piece was tested, and a date letter shows the year. The United Kingdom is the classic example, where a leopard's head has long marked the London assay office. The United States takes a lighter approach. Federal law does not require a stamp at all, but if a maker stamps a quality mark, Federal Trade Commission guidelines call for a registered maker's mark beside it, so accountability sits behind the number.

What You'll Find on a Gilded Horse Piece

Knowing how to read marks makes our own work easy to verify. Every piece we handcraft carries a karat stamp and our ARS maker's mark, the two marks that confirm both the metal and the maker. A solid 14k gold piece shows its karat stamp, and a sterling silver piece shows 925.

You will find these marks across our horse necklace collection, each piece made in the USA and finished by hand. You can read our story to see why this matters to us. The bond between horse and rider deserves jewelry you can trust, down to the smallest detail.