C. 1990. Just planted in our Estate collection, this brightly polished 18kt yellow gold dome ring hosts rich, velvety florals of blue and gr… C. 1990. Just planted in our Estate collection, this brightly polished 18kt yellow gold dome ring hosts rich, velvety florals of blue and green enamel, centered by dewy round brilliant-cut diamonds. At 3/8" wide, it's a simple yet striking pop of color for any occasion. Enamel flower ring. Exclusive, one-of-a-kind Estate Jewelry.