Where: Illinois · North America · approx. 37.42, -88.35 (vicinity only)
Why this spot: Mississippi Valley type fluorite veins
What turns up: Purple, yellow and blue fluorite, calcite, sphalerite, galena and barite on old dumps
Access: Gray area.
Historic mine dumps in Hardin County; some are accessible, others private, confirm access.
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.