Is amethyst igneous metamorphic or sedimentary?

Amethyst is a variety of quartz, which is a mineral that is formed in igneous and metamorphic rocks. Amethyst is typically formed in hydrothermal veins within igneous rocks or as a product of metamorphism in rocks rich in silica. Therefore, amethyst is not classified as a specific rock type, but rather a mineral that can be found in both igneous and metamorphic rocks.