It would be very unusual for a Mandarin Court necklace to include any beads that were not Chinese. Perhaps not impossible, but practically unheard-of. I have speculated upon the few instances where I suspected this may have occurred. Likewise, the reconstructions or imitations of Mandarin necklaces are usually composed from Chinese glass beads. These can be typical furnace-wound beads (which is what you are showing), that are much more "commercial" in quality, and have been abundant in the bead marketplace in my lifetime.

I know of one instance where the necklace was composed from Boshan beads (of drawn and wound manufacture)—but the resulting construction is not compelling, and easily (for me) determined to be a fake.

Jamey