Free Fedex Ground shipping in the United States! Large 19.4 inch tall amethyst cathedral geode from Rio Grande do Sul, Brazil. The cathedral is approximately 7.75 inches across at the base and has a depth of almost 5 inches. The amethyst is a medium purple in color and the crystals are of a fairly uniform crystal size. Minor calcite is present near the edge of one side and the back of the cathedral has been painted as is typical with most of these specimens nowadays. Price is $450.00.