A hardstone cameo and seed pearl necklace, late 18th/early 19th century, designed as a series of

A hardstone cameo and seed pearl necklace, late 18th/early 19th century, designed as a series of agate cameos depicting classical figures in profile, each within a border of seed pearls, connected by two rows of fine chain linking, to a later back section of seed pearls and a gold clasp, length 37.5cm, largest cameo 1.1 x 0.8cm, pearls untested, case stamped Garrard