Our Reiki Symbols Crystal Gift Sets are natural stones that are engraved with the well-know Usui Reiki Symbols taught in most Western Reiki certification and attunement programs. There are five varieties available: Carnelian, Amethyst, Rose Quartz, Brown Shiva Lingham, and Black Shivia Lingham. This is a perfect holiday gift for your Reiki practitioner family member or friend.