The hallmark is the proof.
An independent guarantee of purity — struck by law, not by us.
Birmingham Assay Office.
Every Heavy Lies piece is independently tested and hallmarked at Birmingham Assay Office — the largest in the world, working since 1773. UK law only requires a hallmark above 7.78 grams; we strike every piece regardless. They test the metal, then mark it. It's a legal guarantee that what you're wearing is genuinely 925 sterling silver.
It's the difference between a piece that holds its value, and one that's just silver-coloured.
The anchor of BirminghamThe four marks, explained.
Sponsor's mark
Who made it. Our registered maker's mark, unique to Heavy Lies.
Fineness mark
925 — the purity. 92.5% pure silver, the sterling standard.
Assay office
The anchor of Birmingham, where the piece was independently tested.
Date letter
The year it was assayed — a small piece of provenance.
If it couldn't pass assay, it isn't solid silver. Ours passes — every piece.The Heavy Lies standard
Wear the real thing.
Every Heavy Lies piece is solid 925 — and every piece is hallmarked, even where the law doesn't require it.
Shop solid silver