Ross-Simons - 1.00 Carat Emerald Ring in 14kt Yellow Gold. Size 10. The deep, lush color of emeralds is unmatched! This is evident in this simple yet sophisticated 14kt yellow gold ring. Here, a horizontally set 1.00 carat oval rose-cut emerald is the star of the show. 1/4" wide. Emerald ring. Emerald birthstones are the perfect gift for May birthdays.