Four assorted 19th century rings

Four assorted 19th century rings, including a gold ring ornately set with an emerald and six shoulder diamonds, size O1/2.

A gold ring ornately set with a cushion-shaped diamond and two shoulder sapphires, size L1/2.

An 18ct gold ring set with a cushion-shaped diamond with ornately engraved shoulders and with an inscription dated 1840. London marks for 1839. Size O1/2.

An 18ct gold ring set with five graduated half pearls. Chester marks for 1884. Size N1/2.