Where: Chihuahua · North America · approx. 30.62, -106.51 (vicinity only)
Why this spot: Tertiary rhyolite
What turns up: Colorless to pale-blue topaz in rhyolite cavities
Access: Gray area.
Remote rhyolite outcrops on ranch land; collecting by arrangement.
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.