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Handcrafted Solid Gold
UK Hallmarked

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UK Hallmarking

Real gold,
officially checked.

When you buy gold, you want to know it's really gold. A UK hallmark is a tiny official stamp — checked by an independent office, not just by us — proving your jewellery is exactly what we say it is.

  • Independently verified
  • Hallmarking Act 1973
  • Solid gold, made to order

What's stamped on your jewellery

Look inside a ring or on a clasp and you'll find three small marks.

BM
Maker's mark Shows who made the piece — that's us.
585
Purity mark A number telling you how pure the gold is.
Assay office mark Shows which official UK office tested it.

What the numbers mean

The purity mark is the easy one to remember — it's the percentage of pure gold inside. Each column below shows how full of gold each carat is.

100% 75% 50% 25% 0%

37.5%

375

9ct gold

Most of our pieces

58.5%

585

14ct gold

75%

750

18ct gold

Most Brennmore solid gold is 14ct, so you'll usually see 585 — your independent proof of the gold standard, right there on the piece.

“My piece has no stamp — is it still real gold?”

Yes. UK law only requires a hallmark on gold weighing 1 gram or more. Lighter pieces don't legally need the stamp — but the gold inside is exactly the same purity. Less weight, same quality.

Why it matters

A hallmark is one of the oldest forms of customer protection in Britain. You're not just trusting our word — an independent office has checked it too. That's the whole point: peace of mind that what you're wearing is exactly what it's meant to be.

Made to be worn. Made to be trusted.

Shop solid gold

More on standards: British Hallmarking Council — Dealer's Notice B