Bracelets, pendants, that sort of thing. The chips are the "raw material" for this new, errr, industry. Apparently the trinkets are worth far more than the chips they come from, so it looks like the pricing is based on the final item and not the value of the chip itself. I stopped at one such jewelry-maker's booth at a swap meet some months ago. She had a few bags of Catalin chips more as a display item than as a collectible. I asked for a per-chip price and was quoted $4. Bought a few marked chips but didn't make it a big purchase as I felt I was being ripped off. But maybe not!

Incidentally, the seller told me that green Catalin is the rarest color of all, so if you find any green chips, snag 'em if you can.

P.S.: I have no idea how the plastic is converted into bracelets. A possibly dangerous chemical process? Melted and poured into molds, I guess.