λ Four gem-set clasps

λ Four gem-set clasps, including a French single-row platinum navette-shaped clasp, centred with a button-shaped natural pearl and set with four diamonds, 2.3cm; a gold and platinum clasp mounted with a rectangular carved coral plaque with borders set with small diamonds, 1.5cm wide; a navette-shaped platinum clasp set with a border of calibré-cut sapphires, 2cm wide, a gold clasp centred with an oval-shaped opal within a surround of circular-cut diamonds, 2cm wide