What Is Hallmarking?
Hallmarking is the official process of certifying the purity of precious metals. A hallmark is a small but vital mark that is applied to items made of gold, silver, platinum, or palladium, and it confirms that the metal content has been independently tested and verified by a UK Assay Office to meet legal standards. Think of it as your guarantee that the item you’re buying is made from genuine precious metal and meets minimum purity standards. In the UK, hallmarking is a legal requirement and acts as a reassurance of quality and authenticity.

How Is Jewellery Hallmarked?
Hallmarking is carried out by official UK Assay Offices, which are independent bodies authorised to test and verify precious metal content. Once an item has been tested and meets the required standards, it is hallmarked using one of two methods:
- Stamping: A traditional method where metal punches are used to imprint the hallmark directly onto the item.
- Laser Etching: A more modern technique preferred for delicate or intricate pieces, such as thin bands or detailed pendants, to avoid damaging or distorting the item.
The hallmark is applied discreetly — typically inside a ring band or on a necklace clasp — so it doesn’t affect the overall design.
Why Hallmarking Matters
- At Diamonds Factory, we don’t just see hallmarking as a legal requirement — it’s also a mark of trust.
- Whether you’re investing in a classic gold ring or a unique silver necklace, the hallmark guarantees that you’re getting exactly what you pay for. It’s a seal of authenticity that supports the integrity of the jewellery industry and helps you make confident, informed purchases.
- Whether you’re investing in a classic gold ring or a unique silver necklace, the hallmark guarantees that you’re getting exactly what you pay for.
- It’s a seal of authenticity that supports the integrity of the jewellery industry and helps you make confident, informed purchases.