Bar brooch in platinum, rubies, diamonds and opal

DESCRIPTION: long bar brooch embellished with fifteen square-cut opals, arranged in groups of three and alternating with four old-cut diamonds, frame with carrè-cut rubies, outer band engraved with opposing volutes, bears a hard-to-read punch, probably from French gold, two slightly chipped opals WEIGHT: diamonds ct 0.40 approx, 9.8 g