The world's largest crystal cave

Neither special effects nor fantasy nor processing by Photoshop, it is actually located in southern Chihuahua province of Mexico. It is said to be called "Dream cave". The official name is the Naica mine. It is an incredible scale such as a huge pillar of crystal, is not it.

See other pictures below.
Crystal Cave of the Giants
http://www.canyonsworldwide.com/crystals/mainframe3.html
http://www.canyonsworldwide.com/crystals/pictures/photo.html

The first discovery was in 1794. Naica seems to mean "a place behind the scenes." Until 1900, silver and gold were mined from this cave and zinc was also mined. It was closed during the war from 1911 to 1922, and it seems that this crystal cave was discovered in the place of 400 feet (about 121 m) deep just before closing.

Fan and brothers Sanchez of Pedro dug a new tunnel leading to this cave in April 2000 and rediscover the crystal cave. Reporting this, I immediately made an iron door and blocked this cave. Because hundreds of crystals were unintentionally mined just after discovery.

Among them, the largest crystal pillar is 50 feet (about 15 meters) in height, 4 feet in diameter (about 1.2 meters). Also, crystals of 1 meter to 2 meter level (trans-gypsum) are stretching from there and light seems to reflect, so it seems to be translucent gold or silver. The estimated total weight is 10 tons.

The temperature inside the cave is 65 degrees Celsius and 100% humidity. For that reason, it seems that it was almost impossible to take photographs properly. It seems to move around in the steam. It is said that fatigue reaches its limit in 6 to 10 minutes when it is in the middle, and it will be a hula.

Great nature is great.

2006/06/19 13:06 Addendum

Ore specimen building MOON DROPSI got pointed out by e-mail from the person, but the notation "crystals" on the citation origin site is correct to translate as "crystal" rather than crystal, so this giant crystal pillar is quartz Is not it transparent gypsum (Selenite, crystal of transparent gypsum)? ... apparently ...

As a result of examination, it certainly seems that it is not "crystal" but "transplaster".

plaster
http://www.istone.org/funny/gypsum.html

Extra column "Crystal of huge plaster"
In 2000, the world's largest gypsum crystals were discovered in Mexico. A picture like a one scene of a movie is listed in the following HP. It is a must-see.

This is the link destination.

Crystal Healing - Biggest Crystals on Earth

Surely, it is the same as this one. So, precisely because "Crystal Cave" seems to be correct rather than "Crystal Cave", we have modified a part of the title and body. Thank you for your advice.