Amethyst Geode Purple Quartz Home DecorThis beautiful tabletop size Amethyst geode half features beautiful deep purple crystal clusters and lovely polished Amethyst sides. It will look fabulous on your shelf, side table, bathroom counter, or fireplace mantle. Amethyst is part of the Quartz crystal family and has a hardness of 7. The color of this crystal ranges anywhere from a pale almost lilac purple to a deep almost black purple. What causes it to be this beautiful color is the minerals