C. 1980. From our Estate collection, this pendant necklace features a unique design, combining geometric styling with open space for strikin… C. 1980. From our Estate collection, this pendant necklace features a unique design, combining geometric styling with open space for striking visual appeal. Icy 1.00 ct. t.w. round Old European-cut diamonds shine throughout, crafted in 21kt yellow gold. Suspends from an 18kt yellow gold cable chain. Lobster clasp, diamond pendant necklace. Exclusive, one-of-a-kind Estate Jewelry.