gold necklace with amethyst

An 18k gold rivière necklace featuring twenty-three oval and round amethysts (app. 126 ct) with a gold box clasp and safety chain, end France, 19th century.

weight: 52.6 g
length: 42 cm
dimensions of the amethysts: 9.3 x 5.8 x 5.7 to 18.4 x 15.9 x 13 mm