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Posted By:humbug
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Old Comments:

2011-06-11 21:41:35
Wonderful photos of these extraordinarily huge crystals. I believe that the caves they are in were re-flooded, after these photos were taken, in order to preserve them. It was extremely hot in there and people could only stay for a very short time or they would be overcome by the heat.
2011-06-11 13:15:22
WOW!
2009-12-03 15:36:07
Well, Gab..I'm not an authority on those crystals, but I do know how to look stuff up, and every source I've consulted has said the crytals are Selenite, which is a crystalline form of gypsum, which is essentially hydrous calcium sulfate...In addition to information you can access on-line from Wikipedia and Nat. Geographic, you might want to take a look at the following article : "Formation of Natural Gypsum Mega-Crystals in Naira, Mexico" by Juan Garcia-Ruiz, in the April, 2007 issue of "Geology" , which is, as I'm sureyou know since you're an authority on gypsum and all, the journal of the Geological Society of America.
2009-12-03 09:56:28
I consider myself an authority on these crystals as I have travelved extensively and I can say beyond a doubt that these are NOT gyspum crystals! perhaps you should do a little more research before opening your mouth. ;-)
2009-09-18 14:18:19
These were found when miners working the Naica silver mine in the Mexican state of Chihuahua ( previously noted mainly for its tiny dogs ) broke into a chamber about a thousand feet below the surface. They are selenite (gypsum) crystals.
2009-09-18 12:34:13
thes r some of the most awesome pics av laid eyes on