The mineral quartz is one of the most common mineral species in the world. Not the most common, that is feldspar. The mineral quartz is naturally transparent, but due to impurities it can have a different color and therefore often a different name. Pink quartz is called pink quartz. Quartz with a purple color is often called amethyst. In our web shop we sell very beautiful specimens of the mineral quartz. Both amethyst (so quartz with a very beautiful purple color) and smoke quartz (blackish color) and transparent quartz.