The Naica crystals were discovered by accident in 2000, according to The Naica Project, an organization dedicated to researching and preserving the cave. The formations were accessible only after ...

These crystals are a form of gypsum that develop over tens of thousands of years in geothermal, mineral-rich groundwater. In the Naica Mine's Cave of the Crystals, selenite crystals have grown as ...

The cave's largest crystal found to date is 39 ft in length, 13 ft in diameter and 55 tons in weight. It was only when the groundwater level was lowered during the mining operations that the ...

The cave contains some of the largest natural selenite crystals ever seen before -- the biggest one found there to date has a 39-foot length, a 13-foot diameter and a whopping 55-ton weight.

The giant crystals are actually selenite, a stone known for its cleansing and centering properties. It’s named after the Greek Goddess of the moon, Selene.

"It seems like walking into an oven. You're hit by the heat and humidity, it's simply unimaginable, it sticks to your skin. You go in fighting temptation to go back out again, while your body sweats, ...

The Cave of Crystals is a horseshoe-shaped cavity in limestone rock about 30 feet (10 meters) wide and 90 feet (30 meters) long. Its floor is covered in crystalline, perfectly faceted blocks.

The Cave of Crystals is a horseshoe-shaped cavity in limestone rock about 30 feet (10 meters) wide and 90 feet (30 meters) long. Its floor is covered in crystalline, perfectly faceted blocks.

Mexico's Cave of Crystals stunned geologists when it was first discovered in 2000. The underground chamber contains some of the largest natural crystals ever found - some of the selenite structures ...