C. 1990. Often times, achieving ultimate sophistication is simple. Our exquisite Estate collection necklace proves it, presenting a single, … C. 1990. Often times, achieving ultimate sophistication is simple. Our exquisite Estate collection necklace proves it, presenting a single, sizable 15.5mm cultured South Sea pearl that glows inside a scintillating halo of 1.80 ct. t.w. round brilliant-cut diamonds in 18kt white gold. Perfection! Suspends from a 14kt white gold cable chain. Lobster clasp, diamond and white pearl necklace. Exclusive, one-of-a-kind Estate Jewelry.