Deep within a remote private mine, a remarkable discovery recently captured the attention of all who encountered it. Miners, ...

The three-meter tall amethyst geode - a hollow rock filled with amethyst crystals - is the main attraction at the Crystal Caves at Atherton, southwest of Cairns. But it's now missing a bit after a ...

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?

Large crystals found in geodes and other rocks are relatively ... and emeralds continue to qualify as "precious." (At one time, amethyst was also considered a precious gem, but large reserves ...