Uruguayan amethyst geode with great color and agate/amethyst flowers

A natural amethyst geode from Uruguay in a dark hue, with embedded agate-amethyst "flowers" and several small crystal hedgehogs.

The rim consists of rock crystal and agate, and the back is made of volcanic basalt from the original volcanic matrix. Only the outer rim is cut and polished; the crystals inside remain untreated.

Agate-amethyst flowers form when a second generation of SiO₂ crystallization occurs within the same gas bubble, often as round, flower-like secondary structures with a chalcedonic-amethystine alternation.

Uruguay has been supplying the most intensely colored amethyst worldwide for decades. This specimen combines the typical deep violet saturation with an unusual agate secondary formation.