1970s circular diamond cluster ring with terraced texture

1970s circular diamond cluster ring with terraced texture in 18kt yellow gold. Set with nineteen round brilliant cut diamonds in claw and grain settings, to a floating cluster design with smooth claws, thick florentine, textured border and stepped terrace, met to either side with broad square shoulders with etched and textured finish curving to a geometric shank. Estimated total diamond weight 2.85cts. Marked 18kt gold.