Mexico’s Giant Crystal Cave Is Beautiful But Deadly ... CaSO₄·2H₂O.), some of the largest natural crystals ever found. The largest is 11.40 meters (37.4 ft), with a volume of about 5 ...

The Cave of Crystals is an underground cavern filled with tree-size gypsum crystals, including some of the largest natural ...

These cyrstals, which are the largest ever seen ... Naica’s Crystals Cave, maybe the most amazing underground wonder on Earth, was discovered by chance inside the deep mine of Naica, in the State of ...

Discovered in 1999 inside an abandoned mine in Southern Spain, Pulpí Geode is the largest crystal 'cave' of its kind in the world. But what exactly is a geode and how do crystals form inside them?

Deep below the surface of an isolated mountain range in Mexico sit two ... even more fantastic crystal formations could be found any day." Previously, the world’s largest examples of selenite ...