Necklace with emerald,

Necklace with drop shaped faceted emerald, ap. 6.3 x 4 mm, 24 brilliant cut diamonds, totalling ap. 0.48 ct, RW/VSI-SI, 18K yellow gold, 38,0 g, L: 42 cm, box clasp with security catch, late 20th century, minmal signs of wear.