Ametista do Sul, Brazil: amethyst

Where: Brazil · Europe · approx. -27.36, -53.18 (vicinity only)

Why this spot: amethyst geodes

What turns up: This southern Brazilian town is built on amethyst mines, where huge geodes are worked from the Parana basalts.

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.