Where: Mexico · North America · approx. 20.7, -103.95 (vicinity only)
Why this spot: Rockhounding locality: opal in Tertiary rhyolite
What turns up: fire opal, common opal
Access: Permission required.
Sits in the Jalisco opal belt (centered on Magdalena, ~300 mines) on private/ejido land, so access is 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.