The Unbelievable Way Minnesota’s State Gemstone Was Created

I know what you’re thinking: “Minnesota doesn’t have volcanoes!” And you’d be right. Thankfully, there are no active volcanoes in the Land of Ten Thousand Lakes today. But there used to be.

Over a billion years ago, Minnesota looked very different. Along the north shore of what is now Lake Superior, a massive volcano erupted with incredible force. So powerful, in fact, that we can still find its remnants today, shining in the form of agates scattered across Minnesota’s lakes and shores.

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First things first: What the Heck is an Agate?

An agate is a semi-precious gemstone, a type of quartz, known for its distinct concentric banding or stripped color patterns. These beautiful, often translucent stones form inside cavities of volcanic rocks.

-Google Overview

Ok, now let's address the elephant in the room... Volcanoes? How were these gems formed inside volcanoes, if there's no volcanoes in Minnesota?

There were actually several volcanoes located in Minnesota back in the day. How far back in the day, you might ask? Around 1.1 BILLION years ago... Yeah, that's going way back. Most of these volcanoes were found in the Lake Superior area, except Lake Superior, or really, any of Minnesota's lakes didn't exist yet.

The volcanoes were part of the Mid-Continent Rift, which formed when the core of the North American Continent began to split apart, thus creating volcanoes.

These volcanoes are the very reason so many agates exist within Minnesota's borders.

Wanna learn more about Minnesota's state gemstone? Check out the YouTube video below.