This is a lovely vintage Bakelite necklace of graduated beads in creamed spinach green. It fastens with a filigree slip catch. It looks like it was once a double strand. The beads have been tested with Simichrome and test positive for Bakelite.
It is 17 inches long and the beads are in very good condition. The string appears to be original and is a bit loose so it might be a good idea to restring it at some point.