Gemstones, crystals and shells have long been carried and worn for their healing vibrational energies.  It has been scientifically proven that Quartz crystal carries enough vibration to power watches and other electronics.  This same vibration exists in other gemstones and crystals, as they are all from the Quartz family.  This vibration can be used to enhance healing practices such as Reiki.  In jewelry form, you can keep your favorite crystals with you at all times.  Crystal point necklaces can double as a pendulum as well.