Crafted in 18K gold band ring, the 'Tumbler Ring Amethyst Purple Gemstone' is set with one tumbler gemstone, is after examples of rings dating back to the 14th/15th century.
This type of ring either had a single loose stone or pearl or with a revolving signet bezel. The signet bezel often holds the name of the owner.
Though examples of this type of ring are also found in the 4th/5th century BC in Etruscan.