Barberton wasn`t machine rounded (melted pontil) so technically they wouldn`t be transitional, although I think many people think of them that way. Peltier, yes, because at least the Cerises were hand-gathered and machine-rounded. Again I don`f think people in general think of the Cerises as transitional, but they are. They were making another marble at the same time - the onyx I think it was (although maybe not, I'll have to check) - so they should have been the same, but I`ve never seen an original box of them in person, so I don`t know for sure about them. Maybe someone else is more familiar with those than I am . . .