Anahi mine (ametrine), Santa Cruz

Where: Santa Cruz · South America · approx. -18.03, -57.53 (vicinity only)

Why this spot: Hydrothermal in limestone

What turns up: Ametrine (bicolor amethyst-citrine quartz); the world's only commercial source

Access: Prohibited / view only.

Remote private mine in the Pantanal; specimens sold, no casual collecting

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