An Art Deco aquamarine and diamond bar brooch, featuring an octagonal step-cut aquamarine of light blue colour, approximately measures 10.0 x 9.4 x 5.3 mm, flanked by three diamonds in millegrain collets on each side with an estimated total weight of 0.34ct, fitted with pin stem and roll-over clasp, unmarked white metal testing as platinum, overall length 6.7 cm, total weight of item 5.3 grams.