The largest crystal found in the cave measures over 11 ... which have created some of the most awe-inspiring natural ...

The largest are thought to weigh 40 ... of years and were unlike anything ever discovered on Earth. Fifteen years after the Cave of the Crystals was drained of the water in which the giant ...

Discovered in 1999 inside an abandoned mine in Southern Spain, Pulpí Geode is the largest crystal 'cave' of its ... but how are rare earth minerals used and where are they found?

You can see the zircon ages predicted by the early Earth model in the study in black in the chart to the right. The researchers predict that the zircon could have been created when the biggest ...