Before you just use crazy glue, consider that it is hard to remove, and is stronger than the skin – so you may pull off some skin if you just tear the jewel off your face. (Crazy glue is removed with acetone).
Read the full article: http://actingandactors.com/blog/2018/08/28/what-kind-of-glue-can-be-used-on-skin-in-this-case-for-fastening-rhinestones/