gold necklace with amethyst, peridot and diamond

An 18 carat yellow gold necklace set with 34 oval-cut amethysts graduating towards the center, alternating with 35 marquise-cut peridots, each peridot topped with a brilliant-cut diamond, the necklace closes with an invisible box lock, Italy, Alessandria with maker’s mark, circa 1980.

weight: 84.85 grams
length: 39 cm
dimensions largest amethyst: 12 x 9 x 4 mm
dimensions smallest amethyst: 9 x 6 x 4 mm
dimensions peridot: 7 x 3 x 2 mm