A 19th century coral and seed pearl gold ring

A 19th century coral and seed pearl gold ring, the row of square-shaped coral cabochons set within a surround of seed pearls, size O, a 19th century garnet-set gold ring with white enamel decoration to the pierced scroll shoulders, size M, A George III gold ring set with a rectangular-shaped garnet within a surround of seed pearls and further seed pearls and circular-cut black onyx to the shoulders, size M and a George III reverse-carved crystal brooch, depicting a dog within rectangular gold mount