I know that Joyce has a thing for these... today I was playing with some photos and discovered that color correct lighting really changes the appearance of these beads, I find that in regular incandescent light these appear to be much bluer than in my strobe light for the camera.
It is also unusual how the light affects the different beads differently...one thing for sure is that the rough material that these beads came from is not closely related, this would be a good indicator of old beads as new supplies are typically cut from the rough all from the same source. In person these beads all look about the same....