Crystals have been used for thousands of years.
The first historical references to the use of crystals come from ancient the Ancient Sumerians, who included crystals in magic formulas. The Ancient Egyptians used lapis lazuli, turquoise, carnelian, emerald and clear quartz in their jewellery. They also carved grave amulets of the same gems. The Ancient Egyptians used stones primarily for protection and health. Chrysolite (later translated as both topaz and peridot) was used to combat night terrors and purge evil spirits. Egyptians also used crystals cosmetically. Galena (lead ore) was ground to a powder and used as the eye shadow known as kohl. Malachite was used in a similar manner. Green stones in general were used to signify the heart of the deceased and were included in burials. Green stones were used in a similar way at a later period in Ancient Mexico.