C. 1990. Ethereal color, unforgettable presence. From our Estate collection, this 10mm black cultured pearl ring emits a misty, moonlit glow… C. 1990. Ethereal color, unforgettable presence. From our Estate collection, this 10mm black cultured pearl ring emits a misty, moonlit glow from the center of a glamorous .40 ct. t.w. diamond-studded band. Crafted in polished 18kt yellow gold. 3/8" wide. Diamond and black pearl ring. Exclusive, one-of-a-kind Estate Jewelry.