I have been educating people about these sorts of beads since they first appeared in the international marketplace.

Joycy has mention Kamol, who sells recent/new agate beads from India. I would say it is a mistake that he "has these made." They just a products, made to resemble ancient beads (that were also made in India). The impetus for making these products was instigated by Mark Kenoyer in the late 1980s.

There are both Indian and Chinese versions of ancient banded agate beads. Your beads look Chinese to me—and they have been made for the Tibetan market—and are routinely offered for sale as "ancient" beads, for high prices. The Chinese began selling these beads in 1992.

I highly recommend reading my exposition on Tibetan zi beads, published by Arts of Asia in 2002. It is the most encompassing exposition of zi since 1982. See the link posted here.

I show my collections of these beads at my Facebook Group, Beadman - My Stuff.

JDA.

https://artsofasia.com/product/july-to-august-2002-magazine/