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Amethyst is a purple variety of quartz (SiO2) and owes its violet color to irradiation, iron impurities (in some cases in conjunction with transition element impurities), and the presence of trace elements, which result in complex crystal lattice substitutions.
Element Air. Amethyst is a stone of devotion, purity and chastity. Amethyst is a variety of transparent quartz. Its color varies from almost colorless, pale-violet or bluish-violet up to purple or dark-violet. Immersed in water, natural Amethyst becomes colorless on the surface - a way to distinguish between natural and lab-grown stones.