A group of eight gem-set rings

A group of eight gem-set rings, comprising: an early 20th century gold ring set with three sapphires and two cushion-shaped diamonds, size O, British hallmarks for 18ct gold, date letter for 1906; a tanzanite and diamond ring in 18ct white gold, size U, British hallmarks; an aquamarine and diamond ring in 9ct white gold, size N, British hallmarks; three ruby and diamond rings, sizes M, N1/2 and N1/2 respectively, one stamped 14K, one with British hallmarks for 9ct gold; a 9ct gold ring set with a cabochon opal, size P, British hallmarks; and a 9ct gold ring set with three synthetic rubies and single-cut diamonds, size N1/2, British hallmarks