Pedro II opal mines

ROCKHOUNDING PROHIBITED / VIEW ONLY DOCUMENTED

Where: Piaui · South America · approx. -4.43, -41.46 (vicinity only)

Why this spot: Sandstone-hosted

What turns up: Precious opal (rare Brazilian precious opal), common opal

Access: Prohibited / view only.

Working opal mines on claims; specimens bought from miners

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.