Where: Potosi · South America · approx. -18.42, -66.58 (vicinity only)
Why this spot: Tin hydrothermal veins
What turns up: Phosphophyllite, wavellite, vivianite, and superb cassiterite crystals.
Access: Prohibited / view only.
Historic and cooperative tin mining; underground, not public. Phosphophyllite specimens are legendary.
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.