Minnesota offers an endless variety of places for agate hunters to search out the state gem known as the Lake Superior agate, which often has orange or red hues due to iron along with contrasting white stripes. These agates range in size from tiny pebbles to larger rocks as big as a bowling ball. Lake Superior agates are semi-translucent, which is more easily seen when one is held up to a light.
Some of the best locations for discovering agates include beaches, rivers, and anywhere else you can see exposed gravel, such as a construction site or a dirt road. If hunting the gems on private property make sure to obtain permission first, but you may have some of your best luck on such sites where fewer people think to look, such as a small commercial gravel pit.