Ross-Simons - 4-5mm Cultured Pearl, 30.00ct t. w. Emerald Bead Necklace. 18". Adorn your neckline with our affordable statement piece! This stylish necklace features a lovely mix of 4-5mm cultured freshwater oval pearls that alternate with 30.00 ct. t. w. teardrop faceted emerald beads on a sterling silver rolo chain. Graduates from 3/8" to 1/2" wide. Springring clasp, white pearl and emerald bead necklace. Emerald birthstones are the perfect gift for May birthdays.