Vintage stamped 18KGE Emerald Stones Butterfly Shaped Gold Ring

Late 20th century dainty ring with 6 Marquise shaped Emerald green stones, forming butterfly wings. The center of the butterfly is spread open, displaying a bright shiny yellow gold indent below the antennea. There is wear on the band, some copper coloring has come through the gold electroplating. Stamping inside the band reads 18KGE. Stones are all intact, in good condition. I believe this is a size 6.75 and it's quite possible that it's a 6.5, I have lost weight and I don't know what this size was when it was purchased back in the early 90s.