A collection of fifteen gem-set clasps, including a...

A collection of fifteen gem-set clasps, including a diamond-set gold lobster clasp, 1.5 x 0.8cm, a cushion-shaped emerald-set platinum clasp, 1 x 0.8cm, an oval-shaped openwork diamond-set white gold clasp, 3 x 1.8cm, a diamond-set French white gold clasp, French control mark and obscured maker's lozenge, 1.5 x 0.7cm, a navette-shaped clasp set with an old cushion and rose-cut diamonds in silver on gold, 2.3 x 0.9cm, together with ten other clasps of varying designs set with, emeralds, rubies, sapphires and diamonds