Crystal Cave of Giants. Naica Mine. Chihuahua, Mexico.
These are the largest selenite crystals ever discovered. They are 1,000 feet down in limestone host rock – where miners are mining for lead, zinc and silver – and were formed by hydrothermal fluids emanating from the magma chambers below.
The miners had to drill through the Naica fault, which they were worried would flood the mine, and this is what they discovered…
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