In the UK it is illegal to sell or describe any item as Gold, Silver, Platinum or Palladium unless it is hallmarked*
A UK hallmark is struck by an independent assay office and guarantees the precious metal content of the item you are buying. Sellers in contravention of the law may be prosecuted and could face fines or imprisonment.
To find out more, please click here the image above. Alternatively, if you would like to find out more about what you should do if your item is not hallmarked, please visit The British-Hallmarking-Council