Ross-Simons - C. 1980 Vintage 1.35ct t. w. Diamond Flower Openwork Cocktail Ring Size 6.25. C. 1980. Nothing brings an outfit to life like a beautiful flower! From our Estate collection, this captivating cocktail ring sprouts mesmerizing petals of scalloped 18kt yellow gold openwork that swirl in a windmill-style pattern and are completed with a sparkling outline of 1.35 ct. t. w. round brilliant-cut diamonds in 18kt white gold. 1" wide. Diamond openwork flower cocktail ring. Exclusive, one-of-a-kind Estate Jewelry. Diamond birthstones are the perfect gift for April birthdays.