Natural pearl and diamond necklace. Photo Sotheby's. Composed of 59 natural pearls graduating from approximately 10.3 to 6.1 mm, the clasp set with a marquise-shaped diamond weighing approximately 2.00 carats, mounted in platinum, length 19 inches. With...

Natural pearl and diamond necklace. Photo Sotheby's Composed of two hundred and eighty natural pearls measuring approximately 7.75mm to 2.30mm, spaced by facetted diamond beads together weighing approximately 3.00 carats, length approximately 1400mm....

Important and fine natural pearl and diamond necklace, Van Cleef & Arpels, circa 1956. Photo courtesy Sotheby's. Composed of twenty-five graduated natural pearls measuring approximately 13.75 to 7.05mm, each spaced by facetted diamond rondelles and smaller...

A natural pearl and diamond necklace, Theodore B. Starr, circa 1912. Photo courtesy Bonhams. comprising seventy-one off-round graduated pearls, measuring approximately 8.60 x 9.36 to 4.50mm., completed by a rectangular-cut diamond clasp; signed T.B. Starr,...