Decoding Hallmarks: What Your Jewellery is Trying to Tell You

Ever noticed those tiny marks stamped on your jewellery and wondered what they mean? Those little symbols, called hallmarks, hold a treasure trove of information about your piece—like its metal purity, where it was made, and even who crafted it. Let’s break it down in a simple, conversational way so you can unlock the story behind your jewellery as they’re not just random; every mark has a tale to tell.

What Are Hallmarks?

Think of hallmarks as your jewellery’s passport. They’re official stamps that verify the metal’s quality and origin. These tiny details can help you identify if your piece is gold, silver, or platinum, and even give you a hint of its history.

The Basics of Hallmarks

Here’s what those marks typically include:

1. Metal Purity
   • This tells you how much precious metal is in the piece.
   • For gold, you might see 24k (pure gold), 18k (75% gold), or 14k (58.5% gold). Sometimes it’s written as a number, like 750, which also means 75% gold.
   • Silver lovers, look for 925 (sterling silver) or 800 (80% silver).
   • For platinum, you’ll often see 950, which means 95% platinum.
2. Where It Was Tested
   • Known as the assay office mark, this tells you where the piece was officially verified. For example, in the UK, a leopard’s head means it was checked in London.

1. Who Made It
   • The maker’s mark is like the artist’s signature. It’s usually initials or a small symbol registered to the jeweller or brand.
2. When It Was Made
   • Some jewellery has a date letter—a little code that tells you the year it was hallmarked. It could be a letter in a specific font, like an “A” that means 2024 (depending on the system).
3. Extra Details
   • Country Marks: Some pieces include symbols that show where they’re from. For example, a lion passant on British silver.

1. Special Stamps: Occasionally, you’ll see marks for commemorative events, like a jubilee or celebration.

Hallmark Styles Around the World

1. UK Jewellery: Known for its detailed hallmarks, including purity, assay office, maker, and date stamps.
   • Example: If you see “750, Anchor, ABC, Y,” that’s 18k gold, hallmarked in Birmingham, made by someone with initials ABC, in the year represented by “Y.”

• In 1903, when Sheffield was also allowed to mark gold as well as silver, the Rose was added as a gold mark. 

1. US Jewellery: Usually simpler, with just the purity mark like “14k” or “925.”
2. French Jewellery: Look for an eagle’s head for gold or Minerva’s head for silver. Très chic!

1. Italian Jewellery: Expect numeric purity stamps, like “750” for gold, along with a maker’s code.
2. Scandinavian Jewellery: These often have intricate hallmarks with purity marks and regional symbols—like a Swedish crown for silver.

Why Should You Care About Hallmarks?

• Know What You’re Buying: Hallmarks prove whether a piece is genuine. No guessing games are at play when a mark is present.
• Value Insight: They confirm the metal’s purity, which affects worth.
• A Link to the Past: For antique pieces, hallmarks can reveal when and where it was made— so at The AJC we find hallmarks exhilarating.
• Peace of Mind: Whether you’re buying or inheriting, hallmarks are your quality guarantee.

How to Read Hallmarks

1. Grab a Loupe: These marks are small, so a magnifying glass or jeweller’s loupe is super helpful.
2. Do Your Research: (you’re doing it now!).
3. Ask a Pro: If you’re stuck, a jeweller or appraiser can help you figure it out—especially for rare or antique items.

Our founder, Olly Gerrish, has over 50 years of experience with antique and vintage jewellery and is an expert in her field. She puts her respected name behind every piece of jewellery we sell. Olly is based in our showroom (when she’s not out hunting) and always loves to have a chit-chat with clients personally. Or get to know our founder from the start of her journey selling antique jewellery at Portobello Market to Mayfair by reading Olly’s Story.

Meet Our Founder, Olly Gerrish 

Or even better come to make an appointment and take a peek at all these hallmarks in person- we love sharing our knowledge with those curious enough to come and see.

The AJC offer Free Worldwide Returns, so if you can’t make it to our showroom can order from our website safe in the knowledge that you can return the item if it isn’t perfect.

PLUS: A Tip for Keeping Hallmarks Intact

When cleaning your jewellery, go easy around the hallmark area. You don’t want to polish it down over time—those marks are part of the piece’s story!

Understanding hallmarks isn’t just about knowing what’s in your jewellery box—it’s about connecting with its history and craftsmanship. So next time you spot those tiny stamps, you’ll know they’re more than just random marks; they’re a window into the world of your jewellery.