Yes indeed I did read your extremly fine artical on Pyu.
I'm still not sure yet where this bead fits in as far as dating it.
Is it early PYU, mid PYUetc.
I'm assuming that as you stated,"These beads get mixed in from time to time" probubly when the dealer is having them strung. I'm sure after a while the eyes get tired and something great gets strung with the lesser value Pumtek.
I will read the artical on the Pyu again,maybe you could toss me a bone or two to chew on while I re-read your artical.
Thanks for your help...Danoh