FWIW, they look like American Agates to me. Although, I do find it interesting how much variation there is in those described as such. I've seen handgatherd, swirled, seamed, and a pretty wide range of colors/hues and base glasses called American Agates. Was there really that much variation in what CAC called AAs? It makes me wonder if it was more of a brand name to CAC, rather than a specific type of marble.