Giant amethyst geodes formed within a steady groundwater flow and at unexpectedly low crystallization temperatures, new study ...

Amethyst is a violet variety of quartz that has been used as a gemstone for many centuries and is a key economic resource in ...

New research from the University of Göttingen reveals that amethyst geodes in Uruguay formed at low temperatures from ...

Along with Ametista do Sul in southern Brazil, these regions are the world’s leading mining districts for gems which come ...

Göttingen University researchers in front of a giant amethyst geode in Uruguay. Geodes like this have been found in cooled lava flows dating from the original breakup of the supercontinent Gondwana ...

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 ...

A research team at the University of Göttingen, Germany, reported on its investigation into just exactly how amethyst forms ...

The 23rd Annual ‘Rock, Gem & Jewelry Show’ returns to Sedona on Saturday, October 19 from 10 a.m. to 5 p.m. and Sunday, October 20 from 10 a.m. to 4 ...

Veteran outback truckie Steve Grahame, 72, was recently called upon to help unearth a 22.5-tonne amethyst cluster in the WA’s ...

Sep. 25, 2024 — Manganese is earth-abundant and cheap. A new process could help make it a contender to replace nickel and cobalt in ... Extinct Volcanoes a 'Rich' Source of Rare Earth Elements ...