Where: Colorado · North America · approx. 38.72, -106.07 (vicinity only)
Why this spot: Rockhounding locality: rhyolite flow with lithophysae and gas cavities
What turns up: topaz, spessartine garnet, apache tears (obsidian), hematite
Access: Gray area.
Historic collecting site near Nathrop that is a mix of BLM and private land; access has been fee-charged and reportedly closed by owners, so stay on public land and verify status first.
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.