Very dark Uruguay Amethyst Geode

A particularly dark, natural amethyst geode from Uruguay. The color and shape are characteristic of the highly sought-after premium material from this region, displaying a deep, almost black-violet saturation.

The rim consists of brown agate, and the back is made of the original volcanic basalt. This layered sequence documents the formation of the geode within a gas bubble of a lava flow approximately 100 million years old.

The inner surface has not been treated. The crystals are unusually large for Uruguayan material, sparkle intensely, and exhibit the typical angular growth habit. The agate rim is cut and polished.

A freestanding geode with premium saturation, large individual points, and a fully legible geological structure.