Antique G.H Taylor opal diamond brooch, circa 1900, of cluster design, centring an oval cabochon weighing approximately 2.70 carats within a frame of rose-cut diamonds, flanked by an old European-cut diamond, the diamonds together weighing approximately 0.30 carats, mounted in 15ct gold, length 46 mm, gross weight approximately 4.4 grams, signed G.H Taylor.