Clear Quartz, also known as Rock Crystal or Ice Crystal, is pure silicon dioxide. It has a Mohs hardness of 13. It typically forms as prismatic hexagonal crystals with relatively smooth sides and naturally faceted terminations. Its appearance can range from transparent as glass to milky or striated, often found in clusters. It exhibits a vitreous luster.
Clear Quartz is considered the "Master Healer" and the most powerful healing stone among all crystals. It amplifies energy and thought, as well as the effect of other crystals. It absorbs, stores, releases, and regulates energy. Clear Quartz draws off negative energy of all kinds, neutralizing background radiation, including electromagnetic smog or petrochemical emanations.