Sovereign ring
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The sovereign ring is an article of jewellery worn on the finger. Its primary decorative feature is typically a gold sovereign - either genuine or replica tender - with the obverse face as the visible detail. The coin size is generally either a 'full' or 'half' sovereign. In the United Kingdom it is also common to use custom coinage bearing such motifs as the 'Three Lions', or other similar imagery as Saint George, or a Welsh Dragon.
This style of ring is often regarded as synonymous with chav culture, as it makes an effective knuckleduster.