Ross-Simons - 3.30ct t. w. Emerald, .16ct t. w. Diamond Three-Stone Ring Over Sterling. Size 10. In this ring, three 3.30 ct. t. w. marquise emeralds are lit by .16 ct. t. w. diamonds. Crafted in 18kt yellow gold over sterling silver. 5/8" wide. Diamond and emerald three-stone ring. Emerald birthstones are the perfect gift for May birthdays. Emerald Three Stone Ring, May Birthdays, Emerald Wedding Rings, Emerald Birthstone, 3 Stone Rings, Ring Emerald, Three Stone Rings, Three Stone, Stone Ring