Well, if the first swirl was debunked, then I would like to see reason to keep these in the Peltier "swirl" pile. I don't believe these swirls date that far back, but cannot prove it personally. Lumping marbles into the Pelt column because they contain aventurine doesn't seem plausible. Many swirl manufacturers as well as Master, Akro, and Vitro had aventurine. I just don't see how Peltier fits. Not arguing, and you are free to keep them where ever. Just my thoughts after a couple dozen years of collecting. I open to new info all the time.