Necklace with diamond set and emerald,

Necklace with diamonds and emerald, 68 brilliant cut diamonds, totalling ca. 0.6 ct, different colours from tinted to yellow and brown, P3, 56 diamonds in rectangular to trapeze cut, tinted to yellow, P3, partly defect, drop shaped green emerald, tip broken, 18K yellow gold, 34.4 g, L: ca. 42.5 cm, late 20th century, distinct signs of wear.