Necklace with 3 sapphire cabochons, 2 ruby cabochons,

Collier with 3 sapphire and 2 ruby cabochons, oval, ap. 7 x 5 mm, 125 brilliant cut diamonds, totalling ap. 1.25 ct, 18K yellow and white gold, 60,9 g, L: 41 cm, W: 10 mm, box clasp, 1 security catch, late 20th century, minor signs of wear, 1 diamond vacancy.