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 ...
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 ...
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