We are prohibited from engaging in magic in sorcery. But are we allowed to wear/have amulets such as hamsa and gemstones that are supposed to have certain beneficial (to the wearer) properties as charms?
The general rule regarding charms and gemstones, is that if it has a base in torah or there is a natural or rational explanation why it is beneficial, then it is permitted, otherwise it might be considered Darcei Emori, and it shouldn’t be done, unless it is for healing purposes. So it depends on each specific item.
O:CH 301-27 Shut Chasam Sofer Y:D 138, Darcei teshuva Y:D 179-30, Tomim Tehiyeh (Horav Yackov Hillel shlit”a) Pg 74.