The beaches at Grand Marais are excellent hunting grounds for the ancient Lake Superior agate, a semi-precious stone made up of concentric circles of microcrystaline quartz reddened by iron.

The elusive Lake Superior agate. Rockhounds scour Lake Superior’s shoreline for these rare banded beauties—from the western reaches of the Keweenaw Peninsula to the U.P.’s easternmost ...

Hunting for Lake Superior agates along the St. Croix River. Eric Benson has been hunting for Lake Superior agates along the St. Croix River for the past seven years. The avid angler searches for ...

Lake Superior Agates Found a rock that's reminiscent of caramels? That's a Lake Superior Agate. Known for its red, orange and yellow hues caused by iron oxidation, this swirly agate is a form of ...

But the people on the beach in Grand Marais are on a mission. They’re exploring, seeking and searching for the Lake Superior agate. You wouldn’t believe how old they are. The Lake Superior ...

Jaspers and cherts are the rocks most often confused with Lake Superior agates Lakers formed when mineral-infused solutions seeped into the gas bubbles of volcanic rocks Lake Superior agates are ...

I have found a Lake Superior agate in Hannibal, Missouri," said Roger Biebl, Carlton County Gem and Mineral Club. Beibl got hooked on agate hunting when he was a kid. "This is not polished.

For the past 20 years, Jesse Lofgren has slowly amassed a collection of Lake Superior agates. But when he returned from a monthlong business trip earlier this week, Lofgren discovered that $60,000 ...