I recently had to remove a couple of pearls from ear-posts. I tried the suggestions of using boiling water etc., all to no avail. I made a special soldering iron bit that would clamp the ear-post, switched the electric soldering iron on, gripped the pearl with my fingers and the strip of leather shown in the photo, and gently twisted back and forth until the pearl came off. The screw just clamps on the ear-post.
I got worried by the wisps of smoke that arose, but the pearl was undamaged.
