Minas Gerais, Brazil
This large amethyst cathedral makes a fine decorator specimen, as it is well shaped and has an appealing pale violet-purple color. There are several inclusions which add to its appeal. At least 3 calcite crystals are intergrown with the amethyst, although most (or all) of their surfaces are covered with a druze of amethyst, quartz, and a black mineral, yielding a sparkling gray island against the background of amethyst. Also, the face of the specimen reveals two pink crystals of an unknown composition. The common cacoxinite inclusions inside the amethyst crystals take the form of black fan blades, unfortunately too small to examine without a loupe. The amethyst crystals cover a thin layer of white quartz which forms a relatively thin wall for the geode.