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. Here’s ...

If you plan to ask Scott Wolter about Lake Superior agates, make yourself comfortable. The rock hound has a lot to say. It takes time to explain how agates began forming more than a billion years ago, ...

They were forged in lava, shaped by glaciers, and scattered across a lake that actively hates your toes. I came looking for ...