DANVILLE — Armed with shovels, rakes, and concern for the environment, members of Iowa’s Oldest Boy Scout Troop, Troop 3 of Burlington, recently completed a substantial Conservation Good Turn project ...

In 2019, Michal Mael brought a massive geode to the Kino Gem Show. It weighed thousands of pounds and had a heavy door attached — for everyone who has ever dreamed of being encapsulated by amethyst.

Amethyst geodes—some stretching 5 m long—dot the ancient lava flows of Uruguay’s Los Catalanes mining area. The geodes contain calcite, colorless quartz, and agate, another quartz mineral. Large ...