C. 1990. An exquisite option to celebrate a May birthday, or perfect for any lover of green, this Estate collection ring flashes a bright gr… C. 1990. An exquisite option to celebrate a May birthday, or perfect for any lover of green, this Estate collection ring flashes a bright green 1.31 carat emerald, flanked by crisp trillion-cut diamonds at either side, totaling .70 carats. Crafted in beaming platinum. 5/16" wide. Diamond and emerald ring. Exclusive, one-of-a-kind Estate Jewelry.