Two Victorian rings

Two Victorian rings, including a gold ring set with five graduated half pearls, each separated with two rose-cut diamonds and scroll engraved shoulders. Engraved with presentation inscriptions. Size L.

And an unusual gold mourning ring, set with an oval-shaped opal and decorated with black enamel. Glazed locket compartment to the reverse, containing plaited hair and engraved with presentation inscription dated 1840. Size L.