18K Yellow Gold, South Sea Cultured Pearl, Genuine Blue Topaz Earrings. Aquarella Collection. Pairing hand-selected Australian South Sea and Tahitian Cultured Pearls with meticulously chosen gemstones of rich and vibrant colors has led to the creation of a spectacular and exclusive collection of Fine Jewelry. Paspaley South Sea Cultured Pearls, 11mm plus, with genuine London Blue Topaz set in 18kt gold. Euro back has drop down post for comfortable wear as pierced or clip style earrings. Gold 14K Yellow Gold Approx Wgt 6.94 gms. Finish Satin Gemstones Genuine London Blue Topaz South Sea Cultured Pearl Setting Prong Backing Euro Back