Best spot

Corydon: Calcite & Fluorite Rockhounding in Harrison County, Indiana

Updated July 2026

Corydon, Indiana's first state capital, sits in the karst country of Harrison County at the southern end of the geode belt, where cave-and-spring geology produces calcite, fluorite, dolomite, and quartz along with geodes in the local limestones. The scenic Blue River, a state-designated natural and navigable stream, drains the area. It anchors the far-southern reach of the state's collecting map. Reported finds include calcite, fluorite, dolomite, quartz. Below: coordinates, access notes, nearby spots, and trip-planning links.

Corydon photos

Public image records connected to this spot or its reported material.

1 photo

The 1816 first Indiana State Capitol in Corydon, built of local limestone, Harrison County.

Quick details

Access: Public area
County: Harrison County
State: Indiana
Postcode: 47112
Coordinates: 38.24686, -86.14915

Geology at Corydon

This spot sits on Blue River Group, mapped as limestone that formed roughly 360 to 325 million years ago. Carbonate rock like this dissolves and weathers readily, so fresh road cuts, quarries, and creek exposures are typically the most productive ground.

Mapped unit: Blue River Group
Age: 360–325 Ma (Mississippian)
Rock types: limestone
Elevation: 690 ft

Geologic mapping via Macrostrat and the underlying state geological survey maps (CC BY 4.0). Bedrock at the surface can vary within a mapped unit.

Land & collecting status

Generally open to casual rockhounding

Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig.

Public-land rules vary by agency, season, and field office. The RockHoundR app pulls live BLM, USFS, NPS, and tribal overlays so you can see exactly which agency manages the ground at this spot.

Sources & verification

Spot details combine the public RockHoundR location dataset, normalized mineral labels, agency land-status checks in the app, and community submissions. Coordinates are approximate until verified in the field.

Sources: RockHoundR public spot dataset, app land overlays, and local agency review before each trip.

Found at Corydon

Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

Nearby rockhounding spots

Other rockhounding spots within driving distance of Corydon.

Across the state line from Corydon

Corydon is close enough to the Indiana border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Corydon FAQ

Where is Corydon?+

Corydon is in Harrison County, Indiana, at 38.24686, -86.14915.

What rocks and minerals can you find at Corydon?+

Corydon is reported to produce Calcite, Fluorite, Dolomite, Quartz.

Is collecting allowed at Corydon?+

Generally open to casual rockhounding. Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Corydon?+

A rock hammer, a small pry bar, gloves, and safety glasses cover most crystal ground. A screen helps in loose pocket soil, and newspaper protects points on the way out.

How do I get to Corydon?+

Open the directions link to navigate to 38.24686, -86.14915 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Indiana

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Open Corydon on the map

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