A Regency topaz and gold necklace

A Regency topaz and gold necklace, early 19th century, the chain set with graduated oval topazes separated with fine-link neck chains and seed pearls, suspending a topaz and seed pearl pendant within repousse gold surround, with glazed locket compartment to reverse, later clasp, 40cm long, with a similar pair of Regency topaz earrings, set in yellow gold, one earring hook deficient, length 5cm