Hallmarkes are stamps on items of metal jewellery, indicating their purity, the maker, the assaying office and often the year of marking. Hallmarking precious metals only became compulsory in the 1920s in the UK and hallmarks are also prone to wearing off over time. If there are no hallmarks on an engagement ring, fear not - our expert team is still able to estimate its age by the style, craftsmanship and materials used.