Giant Crystals

These crystals are chambers in the Naica Mine in Chihuahua, Mexico, discovered in 2000 in a lead mine.

Interesting facts:

• They are made of a kind of gypsum, the same material as in dry wall.
• The chambers are along a fault line with magma heating them up to 150 F.
• The largest crystal is 36 ft long, (11 m), 13 ft wide (4m) and weighs 55 tons.
• The gypsum is so soft it can easily be scratched and damaged by tool, boots, even a fingernail.
• The chambers are 1200 feet below the surface.

For more info:

http://myamazingfact.blogspot.com/2009/09/crystal-cave-of-giants-as-beautiful-as.html

http://creation-art.blogspot.com/2008/10/crystal-cave.html

http://news.nationalgeographic.com/news/2007/04/070406-giant-crystals.html