An enamel and diamond mourning ring, circa 1880

An enamel and diamond mourning ring, circa 1880, set with a cushion-shaped diamond in a square border, the setting and shoulders applied with black enamel, mounted in 18ct gold, the interior with commemorative inscription 'Eliza Brown, Born 17th Nov 1813 died July 14th 1880', size P, British hallmarks, date letter for 1880, sponsor's mark EE