The cylindrical amulet case was common in Yemen, transcending religion, age and gender. The diversity in style is great, both, in terms of size and decorations, and in the various ways in which they were worn upon necklaces (daqah, kešaḥ, lāzim, mašḥeṭah, ṭūq, et al.).  Its magical powers are great, even if hadn’t contained a magical formula written upon parchment or slip of paper.