A cultured pearl, topaz, coloured diamond and diamond necklace,

A cultured pearl, topaz, coloured diamond and diamond necklace, circa 2012

Composed of three strands of graduated, faceted black diamonds beads, centering on a pendant set with round brilliant-cut diamonds, suspending a triangular-shaped orange topaz and drop-shaped cultured black pearl, measuring approximately 18.04 x 10.63mm;
signed White; estimated total white diamond weight: 1.20 ct; mounted in 18ct bi-coloured gold; length: 420mm

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Bonhams website