18ct gold, diamond and opal necklace, centred by a buckle motif, bezel-set with a cabochon crystal opal weighing approximately 3.47 carats to a bead-set brilliant-cut diamond surround, the diamonds together weighing approximately 0.36 carats to a flattened curb link chain necklace,, buckle motif measuring approximately 20 x 16 mm, necklace length 450 mm, gross weight approximately 32.3 grams.