A small group of 19th century gem-set rings

A small group of 19th century gem-set rings
Comprising: a navette-shaped plaque ring set with rose-cut diamonds, finger size L; a ring set with two overlapping hearts beneath a bow surmount, set with emerald or diamond centres within diamond and emerald surrounds, finger size L; and a ring of pierced bombé design with rose-cut diamond points, centrally-set with a cushion-shaped pink tourmaline between old brilliant-cut diamonds (3)