A group of seven gold and gem-set rings, comprising: an opal and ruby cluster ring, size I; a five

A group of seven gold and gem-set rings, comprising: an opal and ruby cluster ring, size I; a five stone emerald and opal ring, size M; a tricoloured gold ring set with brilliant-cut diamonds, size N, stamped 750; two diamond solitaire rings in 18ct and 9ct gold respectively, sizes I1/2 and J, British hallmarks; a half hoop ring with brilliant-cut diamonds, size J; and a ring set with green and colourless synthetic stones, size J1/2