Five early 19th century hardstone and gold-cased fob seals

Five early 19th century hardstone and gold-cased fob seals, including a split ring suspending three miniature seals, each set with an intaglio-engraved hardstone plaque, together with a seal containing an oval chalcedony plaque, intaglio-engraved with the profile of a classical maiden, and a seal set with a circular amethyst intaglio-engraved with a floral spray