Retro ruby and diamond three row ring in 18kt yellow gold

Retro ruby and diamond three row ring in 18kt yellow gold. Centred with a horizontally set oval mixed cut ruby in a rubover setting, set to top with a row of round brilliant cut diamonds in grain settings, flanked by square princess cut diamonds in channel settings, set to bottom with a row of round brilliant cut diamonds in grain settings, to a bold cluster ring with raised polished borders and pierced open linear gallery terminating to a solid shank. Marked 18kt gold.