[skip to main content]

Free delivery in the UK

Call an expert on 0292 144 4971

0% interest free credit

hallmarking - your guarantee of authenticity

In the UK it is illegal to sell or describe any item as platinum unless it is hallmarked. The hallmark guarantees the precious metal content, giving you complete reassurance.

When you purchase a platinum wedding ring or a platinum engagement ring from Platinum Ring Company you can be assured of the precious metal content, however, if you would like to check the precious metal content of a platinum ring from the platinum ring company you can check for the hallmarks as described below.

Compulsory Marks

Hallmarks are applied in one of three ways; inside a platinum ring. The traditional method of hand punching and hydraulic press punching are still widely used throughout the industry but in the 21st century, many hallmarks are now laser etched onto items, particularly for hollow, highly finished or intricate items of jewellery and watches.

The sponsor's mark is the unique mark of the company or person responsible for sending the article for hallmarking. The sponsor maybe the original manufacturer, importer, wholesaler, retailer or an individual. To obtain a Sponsor's mark you must register with an Assay Office.

The Standard Hallmark Mark demonstrates the standard of finesse, i.e. the purity of the precious metal content in parts per 1000. For example, 18 carat gold is 750 parts per 1000 by weight.

The Assay Office Mark shows which Assay Office tested and marked the item.

Optional Marks

The Date Mark defined by a stamped letter shows the year in which the article was hallmarked.

Traditional Marks – Still in use today, these traditional marks are sometimes used to show the type of metal.

Commemorative marks – These are special hallmarks to celebrate major events such as the Queens Golden Jubilee (2002) and passing of the Millennium (1999 – 2000).

International Convention Marks – Since 1972 the UK has been a signatory to the International Convention on Hallmarks. This means that UK Assay Offices can apply the common control mark which will then be recognised by all member countries in the convention. Conversely, convention hallmarks that have been applied in other member countries are recognised in the UK.