A collection of three gold and gem-set rings

A collection of three gold and gem-set rings, comprising: one gold ring set with a cabochon turquoise between cushion-shaped diamonds, to a plain 18ct gold band, size O1/2, French assay mark; a diamond half eternity ring, channel-set with brilliant-cut diamonds, mounted in 18ct gold, size N, British hallmarks; and a 19th century gold band set with a turquoise cabochon and engraved with foliate scrollwork, size J