I know the blog author, as she was (formerly) a member of my Yahoo Tibetan Zi Beads Group.

Be forewarned that there are countless imitations and imaginarily-produced Chinese beads that are routinely said to be "jade" (but are not), and said to derive from some ancient Chinese culture (but do not). Some of them take off from actual ancient artifacts (often enough not beads); and some are just made-up.

Ms Tan does not say she is confident that her beads are authentic. As I read it, she just thinks they are interesting beads, and can be related to the culture cited by stylistic similarities.

JDA.