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.
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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