Caledonia Mine, Mass City

ROCKHOUNDING OPEN / LEGAL DOCUMENTED

Where: Michigan · North America · approx. 46.75, -89.08 (vicinity only)

Why this spot: Precambrian basalt, native copper

What turns up: Native copper, silver, and copper in calcite and epidote from underground rock

Access: Open / legal.

Fee dig operated by Red Metal Minerals; you keep specimens you break out.

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.