Assay offices inspect the gold, silver or platinum content of items. Upon approval, they issue a quality mark. If the objects do not (yet) have a quality mark, you may have them in you posession for a maximum of 4 weeks. You may not show them to your customers and you may not offer to sell these objects.
The quality mark looks different depending on which precious metal the object is made of. You can find a chart of the marks on the Radiocommunications Agency's website (in Dutch), the supervising body. Make sure this chart is visible in your store.
Some products are exempt from assaying (in Dutch), such as those that weigh less than 0.5 grams (for platinum), 1 gram (for gold) or 8 grams (for silver) and products intended for export.
There are also instances where an object does not need to have a quality mark, such as gold or silver coins that are not sold as jewellery. Or objects that are too delicate to be marked.
There is a voluntary, internationally recognised hallmark for the precious metal palladium (in Dutch). Articles made from palladium can be submitted to the recognised assay offices to obtain the hallmark.
Objects from foreign countries
If an object from a foreign country has been assayed in the country of origin, the Netherlands can recognise this assaying hallmark. One requirement is that the foreign assay office is an independent agency.
The Netherlands has signed the International Convention on Hallmarks. This means that Dutch assay offices can apply the convention's Common Control Mark, which will then be recognised by all contracting states. Conversely, convention hallmarks applied by other contracting states are recognised in the Netherlands.
Please note: The technical requirements imposed by the Netherlands in respect of precious metals differ from those of other EU Member States. If a gold, silver or platinum object is already allowed in another EU Member State, an assay office may ban its sale in the Netherlands only in exceptional cases.