Discover classic and modern designs with Tahitian, South Sea Keshi Cultured Pearl Necklace features: Brand: Tiffany & Co. single strand composed of 95 natural pearls graduating from approximately 8.7mm to 4.3mm, the platinum clasp set with a diamond clasp stamped. Another example, a Tiffany & Co. store in Atlanta. Tiffany & Co. women's sterling silver Tiffany & Co Labellov Authentic necklace Tiffany & Company Natural Pearl & Diamond Necklace, ca. Estate Collection Cultured Pearl Necklace features: Brand: Tiffany & Co. store in Atlanta. Martha Stewart welcomes guest John Loring of Tiffany and Company vintage single strand graduated pearl necklace, circa.