If the best quality Chinese cloisonne beads appeared during a brief window of time and then were no longer available after the early 1970s, that makes them very collectible, does it not?

The Beijing Enamel Company has been selling off its old warehouse stock from when it went bankrupt in 2002 (I think that was the date), including many bead necklaces. Even these mass-produced beads are very unlikely to ever be made again because they are so labor-intensive that their cost is prohibitive. Attractive cloisonne beads are now made for those Pandora-style bracelets, but they're nothing like the old necklace beads.