A tourmaline and diamond set necklace, France, late 19th century

18 ct gold, platinum, 1 octagonal cut pink tourmaline weighing approx 3,00 ct, 84 rose-cut diamonds weighing in total approx 0,70 ct H-J/SI-P, 5 diamond briolettes weighing in total approx 1,20 ct cognac/P, a later chain with 12 brilliant cut diamonds weighing in total approx 0,48 ct G-H/SI and with 6 8/8 diamonds to the clasp weighing in total 0,06 ct H/SI-P, length: 47 cm, weight: 12,54 g