This is a piece of red slate manufacturing debris. There were attempts to drill the piece from both of the polished ends. The margins show evidence for scoring and snapping (to shape the bead), but it was split during a drilling attempt. Kurt Jordan, Archaeologist
Notes:
Images in this digital collection were released earlier than planned to facilitate access during the 2020 period of social distancing. For a full discussion, see https://digital.library.cornell.edu/collections/seneca