Lot 1766. Conch Pearl and Diamond Necklace. Estimate 1,300,000 — 1,600,000 HKD. Lot sold 1,820,000 HKD. Photo: Sotheby's 2011.

Composed of seventy-eight graduated conch pearls measuring approximately 3.35 x 2.80 x 2.80mm to 9.85 x 8.75 x 8.85mm, alternated by faceted diamond beads, completed by a clasp set with a cushion-shaped diamond, the diamonds together weighing approximately 14.75carats, mounted in platinum, length approximately 700mm.