Agates formed around Lake Superior are extremely rare and precious. Why? Because they formed almost 1 million years ago out of gas bubbles that got trapped in lava flows! Someone found one of these agates randomly and had no idea what it was.
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Agates formed around Lake Superior are extremely rare and precious. Why? Because they formed almost 1 million years ago out of gas bubbles that got trapped in lava flows! Someone found one of these agates randomly and had no idea what it was.
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