A partial light to medium amethyst quartz geode section remains in its host basalt matrix. There is also some mostly massive calcite and associated darker calcite along the front edge of the specimen. The calcite is considered massive as it is heavily cleaved. A nice larger example that shows how the Uruguay amethyst geodes are found in their host basalt matrix. Collected south of Artigas, Artigas Department, Uruguay. Price is $45.00 plus shipping.