Necklace with diamond heart and 45 brilliant-cut diamonds,

Necklace with diamond heart and 45 brilliant-cut diamonds, diamond heart approx. 1.7 ct, STW (I-J)/P1, fluourescence: strong, brilliant-cut diamonds totalling approx. 0.45 ct, RW (F-G)/VS, 18K yellow gold/platinum, 36.2 g, mesh nacklace L: approx. 38 cm, W: approx. 5.1 mm, pendant L x W: approx. 26 x 21 mm, 20th/21st century, signs of wear, with hallmark.