Necklace with fire opal matrix, diamond and 144 freshwater pearls,

Necklace with fire opal in matrix, oval cabochon, 18 x 15 mm, one old european cut diamond, ca. 3.4 x 3.2 mm, 144 fresh water pearls, ca. 6 x 4 mm, white to cream, gold intermediates (24 tubes, 36 lenses), 21.6K yellow gold, 158.7 g, L: 40 cm, 1970 - 1980s, slight signs of wear, handcrafted artist's jewellery, chiseled middlepart, lock, unique piece.