Necklace with coral bouton,

Necklace with coral bouton, D: 14 mm, 1 brilliant cut diamond, ap. 0.10 ct, WHITE (H)/VS, 26 rose cut diamonds, totalling ap. 0.15 ct, 14K yellow and white gold, 18.6 g, L: 43 cm, middle part L x W: 25 x 22 mm, snake chain D: 2.3 mm, box clasp with security catch, 2nd half of 20th century, minor signs of wear, handcrafted.