Largest crystals discoverd on Earth

This picture looks too wonderful to be true but it is coming from National Geographic, so...

The beauty, harmony and symmetry of crystals is most pleasing to those who do a lot of meditation. I post this pictire in remembrance of a friend who is most expert in cristal meditation.

Massive beams of selenite dwarf human explorers in Mexico's Cave of Crystals
deep below the Chihuahuan Desert. Formed over millennia, these crystals
are the largest yet discoverd on Earth

Picture: Carsten Peter ©2008 National Geographic/Speleoresearch & Films