HARVARD SQUARE COMMENTARY

February 26, 2007
Harvard Square Pictorial
Crystal Cave of Giants

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This is the Crystal Cave of Giants found in the Naica Mine, Chihuahua Mexico. These are Selenite crystals (gypsum) and are the largest crystals ever discovered. 1000 feet down in limestone, these crystals were formed by hydrothermal fluids emanating from the magma chambers below.