A collection of 18 stick pins, early 20th century, comprising: a stick pin set with three

A collection of 18 stick pins, early 20th century, comprising: a stick pin set with three cushion-shaped diamonds; one set with a ruby and seed pearls; one set with a star sapphire; one set with a pale blue chalcedony; one composed of the entwined intials SF in bicoloured gold, fitted case with tooled initials SF to exterior; one with a shell cameo of a Bacchante; one with pietra dura inlay depicting a forget-me-not; one with a lava cameo; one set with a tiger's eye cabochon; one set with bloodstone; one with a quartz cat's eye; one set with a faceted rock crystal and cabochon pale green stone, possibly beryl; one with a micromosaic panel depicting the Colosseum; one inlaid with jasper an hardstone depicting a crown over the letter X; one set with a cabochon sapphire; two set with lines of half pearls; and one with a glazed locket compartment within a quatrefoil border, variously mounted in gold and silver, some pins of base metal, four cases