Unique tourmaline necklace with watermelon tourmaline

Unique necklace with oval cabochon-cut watermelon-tourmaline surrounded by 43 brilliant-cut diamonds totalling 1 ct, low-medium colour and clarity, in removable pendant hanging in clip-ring, 4-row necklace made of faceted pink-red tourmalines, clasp with brilliant-cut diamonds totalling ca. 0.17 ct, good colour and clarity, loops between and 2 half-moon parts, made of 18K yellow gold, 89.1 g, L: 46 cm, late 20th century, good condition, handcrafted.