C. 1990. The classic duo of diamonds and emeralds is always appealing, as seen on this shimmering Estate collection ring. Verdant emeralds, … C. 1990. The classic duo of diamonds and emeralds is always appealing, as seen on this shimmering Estate collection ring. Verdant emeralds, totaling .81 carats, form a flowery cluster at the center and dot the top and bottom, amid a sparkling backdrop of 1.20 ct. t.w. round brilliant-cut diamonds. Crafted in polished platinum. 1/2" wide. Diamond and emerald cluster ring. Exclusive, one-of-a-kind Estate Jewelry.