Necklace with oval pendant set with 51 brilliant-cut diamonds,

Necklace with oval pendant, set with 51 brilliant cut diamonds, totalling 0.71 ct (marked), good colour and clarity, 18K yellow gold, 9.6 g, L: 42 cm, L x W (pendant): 13 x 16 mm, carabiner clasp, late 20th century, minimal signs of wear.