Guest guest Posted April 27, 2007 Report Share Posted April 27, 2007 This is the crystal cave of giants found in the Naica Mine, Chihuahua,Mexico. They are Selenite crystals (gypsum) and are the largest crystals ever discovered. They are 1000 feet down in limestone host rock where they are mining forlead, zinc and silver. These crystals were formed by hydrothermalfluids emanating from the magma chambers below. The miners had todrill through the Naica fault, which they were worried would flood the mine, and this is what they discovered. Quote Link to comment Share on other sites More sharing options...
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