Iraí amethyst and agate

Where: Rio Grande do Sul · South America · approx. -27.19, -53.25 (vicinity only)

Why this spot: Cretaceous basalt vugs

What turns up: Amethyst geodes, agate, quartz

Access: Prohibited / view only.

Commercial geode mines; buy from operators

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