The study of the material culture of magic is sort of the new frontier, as people have worked over the literary remains of antique magical traditions with a pretty fine-toothed comb at this point. A new book contributes to this trend in scholarship:
Adam Parker, Stuart McKie, Material approaches to Roman magic: occult objects and supernatural substances. TRAC Themes in Roman archaeology, 2. Oxford: Oxbow, 2018.
The volume is reviewed here.