Verdura pearl diamond spinel necklace in yellow gold. 18K yellow gold A single strand of South Sea cultured pearls interspersed with faceted black spinel beads, forty 18K yellow gold beads, four moonstone set sterling beads and four diamond setsterling beads with a tassel consisting of a faceted black spinel cabochon. diamond, 33 stones weighing 0.83 carat, cage mounting and a graduated