Conch Pearl and diamond necklace

The double strand necklace composed of thirty-four conch pearls measuring approximately 5.83 x 4.80 x 4.75mm to 9.75 x 8.52 x 8.02mm, joined by briolette diamonds, completed by a marquise-shaped and brilliant-cut diamond-set clasp, the diamonds together weighing approximately 15.50 carats, mounted in platinum, length approximately 410mm.