Cornwall — Rockhounding in Lebanon County, Pennsylvania
Updated July 2026
Cornwall is one of the most famous iron deposits in eastern North America, a magnetite skarn worked for over two centuries. The contact-metamorphic assemblage produced a rich suite of andradite garnet, actinolite, calcite, chlorite, diopside, epidote and magnetite that is textbook Pennsylvania mineralogy. Its historical and mineralogical significance makes it a marquee locality. Reported finds include actinolite, andradite, calcite, chlorite, diopside, and more. Below: coordinates, access notes, nearby spots, and trip-planning links.
Cornwall photos
Public image records connected to this spot or its reported material.
Map showing Cornwall in Lebanon County, Pennsylvania
Quick details
- Access
- Public area
- County
- Lebanon County
- State
- Pennsylvania
- Nearest road
- Twenty-Eighth Division Highway
- Postcode
- 17016
- Coordinates
- 40.25479, -76.39783
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 Cornwall
Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.
- ActinoliteEncyclopedia →
- AndraditeEncyclopedia →
- CalciteEncyclopedia →
- ChloriteEncyclopedia →
- DiopsideEncyclopedia →
- EpidoteEncyclopedia →
- FluoriteEncyclopedia →
- Grossularite GarnetEncyclopedia →
- LabradoriteEncyclopedia →
- MagnetiteEncyclopedia →
- MoonstoneEncyclopedia →
- PrehniteEncyclopedia →
- PyriteEncyclopedia →
Nearby rockhounding spots
Other rockhounding spots within driving distance of Cornwall.
- Lebanon CountyLebanon County, Pennsylvania · 10 mi awayAzurite, Chalcopyrite, Magnetite
- Grubb Lake and Mud LakeLancaster County, Pennsylvania · 14 mi awayGeode, Limonite
- BainbridgeLancaster County, Pennsylvania · 18 mi awayPetrified Wood
- LancasterLancaster County, Pennsylvania · 20 mi awayDogtooth Calcite, Fluorite, Hematite
- York HavenYork County, Pennsylvania · 21 mi awayPetrified Wood
- HarrisburgYork County, Pennsylvania · 24 mi awayAgate, Amethyst, Chalcedony
- ReadingTop pick in PennsylvaniaBerks County, Pennsylvania · 26 mi awayJasper
- ChurchtownBerks County, Pennsylvania · 26 mi awayPetrified Wood
Across the state line from Cornwall
Cornwall is close enough to the Pennsylvania border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.
- CardiffHarford County, Maryland · 38 mi awayGarnet, Pyrite, Serpentine
- Rock SpringsCecil County, Maryland · 39 mi awayKammererite, Serpentine, Soapstone
- FlintvilleHarford County, Maryland · 39 mi awayFeldspar, Garnet, Mica
- Flintville (moss agate area)Harford County, Maryland · 39 mi awayMoss Agate, Jasper
- CastletonHarford County, Maryland · 40 mi awayQuartz, Tourmaline
- Funks Pond Recreational AreaCecil County, Maryland · 42 mi awayKammererite, Serpentine, Soapstone
Cornwall FAQ
Why is Cornwall one of the best rockhounding spots in Pennsylvania?+
Where is Cornwall?+
What rocks and minerals can you find at Cornwall?+
Is collecting allowed at Cornwall?+
How do I get to Cornwall?+
More rockhounding in Pennsylvania
See all 86 Pennsylvania spots →Open Cornwall on the map
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