Amethyst Pyramids – These are cut and polished Amethyst Pyramids. Pyramids are a form of Sacred Geometry and help to amplify any vibration. Pyramids are wonderful to use in Crystal Grids as the center as they can help to collect and focus energy. Pyramids also make wonderful shapes for display and are great for any meditation corner. Amethyst is a popular purple-colored variety of quartz that contains manganese. It is the manganese that produces Amethyst’s purple color, the iron content in the stone determines the relative darkness of the purple. One of the most popular metaphysical stones, Amethyst is very powerful and protective.