A Victorian/Biedermeier necklace, late 19th century

yellow gold (unmarked), white and light blue enamel detail, 1 octagonal cut garnet, 2 emeralds, 6 seed pearls, 1 freshwater pearl drop measuring in diameter 9,5 mm, with box link chain detail, width of the pendant: 4 cm, height: 4,8 cm, with an integral open link chain, length: 54 cm, with a copper clasp, weight: 14,92 g