A collection of four gold and gem-set stick pins

A collection of four gold and gem-set stick pins, late 19th century, comprising: one stick pin set with a step-cut emerald; one set with a cushion-shaped diamond suspending a lapis lazuli bead; one set with a turquoise cabochon; and another of trefoil design, set with a diamond, a sapphire and a garnet, each mounted in gold, the longest 7.2cm