The name amethyst derives from the Greek words meaning "not drunk," for this quartz crystal was believed to keep the wearer sober no matter how much wine he might consume. Prized throughout the ancient world, amethyst was especially popular in Egypt, Greece, and Rome. Amethyst is useful for cleansing the body of impurities, for clearing the mind, and for improving memory. It gives the wearer pleasant dreams, and is reputed to inspire creativity. Because of its purple hue, amethyst is said to have a soothing effect on the spirit. The energy level radiating from this royal gem is especially high, causing the wearer to feel wonderful both inside and out. In the orient, rock crystal is considered the considered the perfect jewel, symbolic of purity, infinity, patience, and perseverance. Throughout history, in every part of the world, man has valued this transparent, colorless quartz for its benevolent power and faultless beauty. As an amulet rock crystal is thought to cure ailments of the glands, the eyes, the intestines and the heart. Worn by a sleeper, it is believed to prevent bad dreams. Its chief appeal has always been its transparent purity, the very personification of virtue, goodness, and innocence. Those who wear it are kept pure in body and spirit.