I intended to mention that.

The 17th C. a speo beads are seen occasionally from several parts of the world. Not only from NE N America, but also from S America (Peru), W Africa, and the Middle East.

In West Africa, they are what inspired powderglass imitations, made in Mauritania, and called (by some collectors) "Oalata beads."

In any event, I have shown these beads a number of times—though not lately. I'll see what images I can pull up....

Jamey