Sorry, I am not following your train-of-thought and point.

Prosser beads do not look like ceramics, in my opinion. They look like an odd sort of glass. This is because they ARE largely glass—often being translucent, colored through the mass, and in a fairly broad variety of colors.

You remark "...so why should we call one Prosser and not the other one ?"

One what; and what is the other one? Please clarify.

About five years ago, I posted a series of messages about Prosser beads (and how they compare to other molded glass beads that are not Prosser beads), that I happen to have as a PDF file. Unfortunately, it will not load here. But I will e-mail it to anyone who is interested.

It doesn't matter to me whether factories or museums distinguish or can't distinguish between types of beads—except that if they cannot their knowledge is limited and unreliable. As a technical historian, it's my job to be able to make these distinctions, and to present the information in a way that is understandable and useful.

Jamey