Jay Cooke State Park
Approximate — check official site before visiting
Located along the St. Louis River near Lake Superior. Known for agates, thomsonite, and other Lake Superior gemstones in river gravels and outcrops.
🪨 What You Can Find Here
Agates
Banded chalcedony prized for their colors and patterns. Lake Superior agates, Fairburn agates, and Montana moss agates are especially famous.
Also found at:
Quartz Crystals
Clear, smoky, and rose quartz crystals are among the most common and rewarding rockhounding finds. Arkansas produces world-class quartz.
Also found at:
📍 Nearby Locations in Minnesota
Lake Superior Agate Beds
Grand Marais, Minnesota · Public Land
Lake Superior shoreline and gravel pits for the prized Lake Superior agate. These banded agates were distributed by glaciers across Minnesota.
Moose Lake Area Agates
Moose Lake, Minnesota · Public Land
Gravel pits and creek beds known for Lake Superior agates. The Moose Lake agate show is a major annual event. Agate Capital of Minnesota.
Thomsonite Beach
Grand Marais, Minnesota · Public Land
Beachcombing for thomsonite — a zeolite mineral found in beach pebbles. Unique to Lake Superior's north shore.
⛏️ Recommended Gear
Make the most of your visit to Jay Cooke State Park with the right equipment.
Rock Hammer
The most essential rockhounding tool. Choose a hammer with both a flat striking face and a pointed pick end.
Typical: $25-45
Safety Glasses
Mandatory protective gear. Rock chips fly unpredictably when hammering.
Typical: $10-20
Chisel Set
Cold chisels in 3-4 sizes for precise extraction from matrix rock.
Typical: $15-30
Geologist's Pick
A heavier crack hammer for splitting hard rock. Essential for hard rock mining areas.
Typical: $35-60
Sifting Screen
Stackable mesh screens for sifting gravel and dirt. Essential for gem and fossil hunting.
Typical: $20-40
UV Flashlight
Long-wave UV light for finding fluorescent minerals and Yooperlites.
Typical: $15-35