Worry stones, also known as palm stones or thumb stones are smooth polished gemstones. They have a thumb-sized indentation so you can carry it in your pocket and rub it for relaxation and stress relief. People use them by holding the stone between the index finger and thumb and rubbing one's thumb back and forth across the stone.  It is believed to be a self-soothing exercise.
Amethyst promotes calm, clarity and spiritual development.  It clears out negative energy and brings in courage.  Amethyst helps you get better sleep, calms anxiety and releases anger.