In my shop at Vintage Modes, Grays Antiques, in London, I have a number of faux pearl vintage necklaces.  These are glass beads coated to look like the real thing.  I have them in different lengths and colours - and some multistrands.  This one is short - approx 15 3/4 inches - and it has a silver, paste and pearl clasp. 781 B39/5