I largely agree with you.

Regarding the dating of murakad beads—like most beads, they are popularly considered to be rather older than is likely..., but few people say what and why (they think that).

Consider the glass colors. The typical beads routinely feature a bright opaque red glass that did not exist before about 100 years ago. I believe murakad beads to be, essentially, a 20th century art form. Their heyday was probably the 1920s. I expect that the beads broken down to powder, for decorations, were most likely colorful seedbeads, and perhaps molded glass beads from Czechoslovakia (that we see in these exact same colors—red, blue, yellow, etc.).

It would be interesting if less-colorful beads that could be presumed to be "earlier" were ever seen..., but to my knowledge they are not.

Jamey