1980s Ruby & Diamond Broad Cocktail Ring in 18kt Yellow Gold

1980s ruby and diamond broad cocktail ring in 18kt yellow gold. Centred with an octagonal emerald cut ruby in a rubover setting, surrounded by a cluster of round brilliant cut diamonds in pave settings terminating to either side with a vertical row of channel set round brilliant cut diamonds, to a broad cluster design with tubed borders to top and bottom and a smooth polished shank. Hallmarked 18kt gold.