Thank you so much for the identification!! That's very helpful. I just did a bit of research and find that they are no close to be added to the endangered species list :-( And saw on Etsy selling from Hong Kong selling strands. So sad. I know these are vintage, so guess I can take solace that I'm not contributing to current problems.
Thank you again, learned a lot from just a small lots of bead from a necklace.