Amethyst Geode from Uruguay

An amethyst geode from Uruguay, a compact collector's geometry from the classic Uruguayan premium deposits. The opened geode cavity shows a dense growth of deep-violet quartz tips against the agate border.

Uruguayan amethyst crystallizes in volcanic geodes of the Arapey Basalt Formation. The formation originated around 130 to 138 million years ago during the Jurassic-Cretaceous transition, when South America separated from Africa. The lava flows from this period still produce the highest quality amethyst geodes in the world.

Its compact geometry makes the piece a well-balanced display cabinet element. Its shallow depth makes it flat and easy to position.

The violet color is caused by traces of iron in the quartz lattice, triggered by natural gamma radiation in the surrounding basalt. It remains stable in the shade for decades.