Where: Chihuahua · North America · approx. 27.85, -105.5 (vicinity only)
Why this spot: Tertiary hydrothermal
What turns up: Giant transparent selenite (gypsum) crystals, plus galena, sphalerite and silver ore; the famous Cave of Crystals swords.
Access: Prohibited / view only.
Active industrial lead, zinc and silver mine (Penoles); the crystal caves are flooded and closed. No public collecting. Specimens reach market only through the company 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.