Curb chain with 2 sapphire, 2 ruby and 1 emerald cabochon,

Necklace, curb link chain with 2 sapphires, 2 rubies, 1 emerald cabochon, oval, 8 x 6 mm, in bezel setting, 14K yellow gold, 50.4 g, 43 cm, W: 7 mm, box clasp, 2 security catches, late 20th century, minimal signs of wear.