From top:Golden South Sea pearl strand with diamond pavé ball clasp, $150,000 at Harry Winston (800-988-4110).
Tahitian “pistachio” pearl necklace, $24,000 at Angela V, by appointment only (212-734-5652).
Platinum diamond-and-natural-pearl necklace, circa 1925, $75,000 at Stephen Russell (212-570-6900).
Pink tourmaline necklace with lemon quartz and cultured pearls, $14,000 at Bulgari (800-285-4274).
Large hammered gold-ball necklace, $9,675, by Paloma Picasso for Tiffany & Co (800-526-0649).
Cartier gold-link necklace, circa 1965, $17,500 at Primavera Gallery (212-288-1569).
Yellow and white diamond necklace in platinum and yellow gold. Price upon request at Graff (212-355-9292).