Rockhounding in Hancock County, Maine

Hancock County

Catherine Mountain holds a nineteenth-century molybdenite prospect where molybdenite occurs in granite pegmatite, rare vugs, and fractures, alongside reported scheelite and wolframite. The peak sits inside the state-administered Donnell Pond Public Reserved Land, where the Maine Geological Survey allows casual hobby collecting without a permit.

Molybdenite, Scheelite, Fluorapatite, Magnetite

Hancock County

Tunk Mountain is carved from the Tunk Lake pluton, a concentrically zoned alkali granite that grades into rapakivi granite, producing smoky quartz, perthitic feldspar, and dark hornblende-bearing rock. The peak sits on Donnell Pond Public Reserved Land, where the Maine Geological Survey allows casual hobby collecting without a permit. It is a granite-and-quartz site rather than a gem pegmatite.

Smoky Quartz, Feldspar, Hornblende, Biotite