Artigas, Uruguay: amethyst geodes

Where: Brazil · Europe · approx. -30.4, -56.5 (vicinity only)

Why this spot: amethyst geodes

What turns up: Northern Uruguay around Artigas is one of the world's great amethyst-geode sources, mined from basalt flows; visits are through commercial mines.

Access: Permission required.

Fee-dig site: pay to dig and keep what you find. Call ahead for hours, prices and what tools are allowed.

Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.