Finishing & Quality Control
Planning UK Hallmarking for a New Jewellery Production Run
UK hallmarking should be considered while a jewellery production run is being planned, rather than treated as an unexplained final task. The responsible business needs to establish the applicable requirement, who will submit the goods and how that stage fits with assembly and finishing.

UK hallmarking should be considered while a jewellery production run is being planned, rather than treated as an unexplained final task. The responsible business needs to establish the applicable requirement, who will submit the goods and how that stage fits with assembly and finishing.
The following legal basics are drawn from official guidance. The production suggestions are practical planning advice; the assay office should resolve the treatment of a particular mixed, unusual or otherwise uncertain article.
Discuss UK hallmarking production planning
Identify who will arrange hallmarking within the proposed workshop route.
Confirm the requirement for the actual goods
Official hallmarking guidance lists weight exemption thresholds of 1 gram for gold, 7.78 grams for silver, 0.5 gram for platinum and 1 gram for palladium. Articles below the relevant threshold can be exempt; confirm the applicable rules and exceptions for the actual product before supply.
A UK hallmark normally includes the sponsor’s mark, metal fineness mark and assay office mark. A date letter is optional. A stamped fineness number alone should not be treated as a complete UK hallmark.
Identify the submitting party
Agree who arranges submission and which registered sponsor’s mark will be used. The sponsor is the person or business submitting the article, not necessarily the person who carried out every manufacturing operation.
Keep this responsibility in the production record. If the manufacturer, retailer and another supplier are all involved, a general assumption that someone else will arrange hallmarking can leave the task unplanned.
Discuss construction and marking access
Provide the assay office with the relevant material and construction information, particularly where an article combines metals or has an unusual form. Ask about suitable marking arrangements for the actual piece.
Coordinate that advice with the workshop. Location, surface finish and access can affect the production sequence. A finished sample should not be altered to create space for a mark without reviewing the implications for the approved design.
Before the next production step
Confirm submission responsibility and marking access with the relevant parties.
Include submission and return in the schedule
Confirm current service arrangements directly with the assay office. Do not rely on a turnaround remembered from an earlier order. Identify who prepares the consignment, checks the quantity and receives the returned work.
If hallmarking occurs before another workshop operation, make the handover condition clear. If it occurs after final finishing, agree how the returned piece will be inspected before it is accepted as complete.
Check the returned goods and records
Reconcile quantities and identify any item requiring further action. Confirm the marks and condition against the agreed submission and product information. Retain the relevant record with the production job so the retailer can understand the completed stage.
The official business compliance guidance also covers the Dealer’s Notice and online explanatory information. Treat retail compliance as a separate responsibility from physically submitting the goods for marking.
Make hallmarking an identified production stage
For work commissioned from A&M, confirm who arranges hallmarking and what condition the workshop is expected to hand over. A named responsible party and a clear place in the route prevent a required task becoming an assumption between suppliers.
Plan the work with A&M
A&M can assess your trade enquiry in the context of the actual piece and requested workshop stages. Bring the references discussed in this guide so the next decision can be made on clear information.
Frequently asked questions
Does a 375 or 750 stamp alone constitute a full UK hallmark?
No. A complete UK hallmark includes the required component marks. Consult the official guidance or assay office when checking a particular article.
Should hallmarking always happen after every other operation?
There is no universal sequence stated here. Discuss the construction, access and finish with the assay office and workshop, then record the agreed route.
Does this article cover alterations to already hallmarked jewellery?
Its focus is new production. A&M’s existing article on hallmarking after an alteration provides related reading; the relevant assay office should advise on the particular altered article.
