Where: Michigan · North America · approx. 44.76, -85.6 (vicinity only)
Why this spot: Rockhounding locality: Petoskey/Charlevoix stones on public bay beaches
What turns up: Petoskey stone, Charlevoix stone, crinoids, chain coral
Access: Open / legal.
Surface collecting on public Grand Traverse Bay beaches allowed within Michigan's 25 lb/person/year limit; respect private lakefront above the high-water mark.
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.