Rings in 15ct gold — 62.5% pure gold — a British hallmarking standard that existed only from 1854 to 1932. Any ring bearing a 15ct or 625 hallmark was made within this 78-year window, making the 15ct stamp one of the most useful dating markers in the antique ring trade. The standard was introduced by the 1854 Gold and Silver Wares Act and abolished on 1 January 1932, replaced by 14ct to align with international practice.
The colour of 15ct gold is warm and rich — deeper than 9ct or 14ct, slightly softer in hue than 18ct. The exact tone varies with the alloy: higher copper gives a warmer, rosier shade; higher silver produces a paler, greener cast. At 62.5% gold content, 15ct rings feel more substantial on the finger than 9ct pieces, with a density and heft that experienced handlers recognise. The purity provided a practical balance between appearance and durability — hard enough for detailed work like intaglio signet rings, mourning rings with enamel, and pieces with vulnerable engraving.
Birmingham Assay Office (anchor mark) hallmarked the largest volume of 15ct gold, with London (leopard's head) and Chester (three wheatsheaves) also significant. Look for "15", "15ct", "15c", or "625" stamped inside the band. Ring types include signet rings, mourning rings, Victorian dress rings, and Edwardian cluster designs. For a detailed guide, see our article on 15ct gold in antique jewellery.
