Is it permissible for a woman to adorn herself with jewelry in the shape of a hand (a khamsah)? Thank you.

There is no objection to jewelry designed in the shape of a complete hand with fingers, because the forbidden images and designs are those that have a head from living beings, due to the saying of the Prophet, peace and blessings be upon him: "The image is the head, so if the head is cut off, there is no image."