Large onyx and diamonds gold brooch

18k white gold, with a pair of carved onyx flowers centred by diamonds and surrounded by thin diamond ribbons.
Round brilliant cut diamonds ca. 6.40 ct, F-G, VVS-SI.
Hallmarked "750 - 19 PD".
Dimensions 120 x 65 mm. Weight 90g.
Item condition grading: ***** excellent (as new).