Where: Artigas · South America · approx. -30.4, -56.47 (vicinity only)
Why this spot: Cretaceous Parana basalt
What turns up: Deep-color amethyst geodes and cathedrals, prized for saturated purple.
Access: Prohibited / view only.
Commercial amethyst mines near the Brazil border. Not open collecting; buy from mines and dealers.
Open in Mudlark Map →
Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.
Pins are approximate by design. This page is historical research, not permission to dig. Check ownership and local law first.