Assay Office Birmingham
The largest Assay Office in the world, responsible for testing precious metals, assuring their purity, and issuing hallmarks; includes a history, details of their services, news, and resources about the jewellery industry.
British Hallmarking Council
A body created to supervise the activities of the four assay offices with regard to hallmarking and ensure their provision and standards. Provides a guide to their role and activities, legislation, resources, and contacts.
Edinburgh Assay Office
Involved in testing precious metals and hallmarking them since 1457; with information about their services, a company profile, contacts and news.
Goldsmiths' Company Assay Office
Tests the quality of gold, silver, platinum, and palladium articles and issues hallmarks. Includes details of their services and laboratory, with background and history of hallmarking.
Sheffield Assay Office
Offers services related to testing and assessing the precious metal content of items, and a range of metal and mineralogical testing services; provides a profile and history, details of their services, and information about their library and silver collection.