49th Annual Carlton County Gem & Mineral Club Agate Days, the world's premier Lake Superior agate show. Over 100 indoor and outdoor vendors featuring minerals, fossils, jewelry and lapidary equipment. Special Kids Dig for ages 8 and under. Hourly Drawings. Also featuring the Clark Olsen Agate Stampede on Saturday at 3 p.m. with 400 pounds of agates and $400 in quarters are added to a dump truck full of gravel and spread along Elm Avenue for a wild scramble of finders-keepers.