Amethyst Flat Bottom GeodeA geode with a flat baseno stand required, no tipping, just violet crystal standing on its own. This amethyst geode has been cut flat at the base so it stands independently without a mount. The interior shows the druzy quartz growth characteristic of geodes from the Paran volcanic province of southern Brazil and Uruguayquartz deposited in layers inside an ancient basaltic vesicle over millions of years. Iron impurities and natural irradiation during