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Jewel of London
Know your jewellery

Hallmarks & diamond reports

Know what your documentation covers.

The metal

A recognised hallmark records independent testing of precious-metal fineness. UK requirements depend on metal, weight and exemptions.

The diamond

A grading report describes a specific diamond. Check the laboratory, report number and characteristics; not every small stone comes with an individual report.

Before launch

The approved Dealer’s Notice and product-specific hallmark and documentation details will be added. This preview makes no collection-wide certification claim.

Official hallmarking guidance
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