RockWoofSketch map
Woof’s favorite find
Cornwall Mine
We picked it because its USGS record mentions 3 gem or collectible minerals (Garnet, Gold, Silver) and 6 of our card minerals overall. No other named site here scores as high on both counts. USGS lists it as past producer for Iron, Cobalt. Minerals mentioned: Garnet, Gold, Magnetite, Pyrite, Copper, Silver. Approx. location 40.269, -76.403. USGS record.
Ask first: a USGS record doesn’t mean you can visit. Find out who owns the land and get permission before collecting.
Field cards: what kind of sites?
Produced ore or material at some point in the past.
Status terms come from USGS MRDS records.
Mineral cards
Magnetite
Mohs 5.5–6.5. Black and strongly magnetic. Mindat
4 sites
Pyrite
Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat
3 sites
Copper
Mohs 2.5–3. Native copper is soft and turns green as it weathers. Mindat
3 sites
Silver
Mohs 2.5–3. Native silver tarnishes black. Mindat
3 sites
Gold
Mohs 2.5–3. Soft, heavy and bright yellow; it doesn’t tarnish. Mindat
2 sites
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
1 site
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
1 site
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
1 site
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
Minerals recorded here
Magnetite 3Pyrite 1Chalcopyrite 1Commodities
Iron 5Cobalt 3Copper 2Gold 2Silver 2Sulfur-Pyrite 1Sulfur 1Sites
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Carper Mine | Iron | Magnetite | Past Producer | 40.275, -76.518 |
| Cornwall Mine | Iron | Magnetite | Past Producer | 40.269, -76.403 |
| Cornwall Mine | Iron, Cobalt | Magnetite, Pyrite, Chalcopyrite | Past Producer | 40.269, -76.403 |
| Cornwall East and Open Pit | Iron, Cobalt | — | Past Producer | 40.272, -76.413 |
| Cornwall Mine | Iron | — | Past Producer | 40.269, -76.403 |
| Rexmont Reservoir | — | — | Past Producer | 40.276, -76.363 |
| Doner Mine | — | — | Past Producer | 40.279, -76.385 |
| Bethlehem Mines Mineral Prep Plant | Sulfur-Pyrite | — | Past Producer | 40.269, -76.396 |
| Carper Mine | — | — | Past Producer | 40.271, -76.523 |
| Cornwall Mine and Pellet Plant | — | — | Past Producer | 40.269, -76.403 |
Fossil collections
The Paleobiology Database lists 3 fossil collection records in Lebanon County. These are research records, not public dig sites.
Nearby counties
Dauphin County · Lancaster County · York County · Berks County · Chester County
Pennsylvania mineral guides
- Mica in Pennsylvania
- Magnetite in Pennsylvania
- Pyrite in Pennsylvania
- Copper in Pennsylvania
- Silver in Pennsylvania
Back to all Pennsylvania counties.
How we built this page: we counted named sites in the USGS Mineral Resources Data System (MRDS) for this area, left out sand, gravel, crushed stone, clay pits and unnamed sites, grouped them by Census county, and linked every site to its USGS record. We did not visit these sites, and MRDS does not tell you who owns the land or whether collecting is allowed.
Source: USGS Mineral Resources Data System (MRDS). USGS ceased systematic updates to MRDS around 2011, so status and details may be out of date. Each site links to its USGS record.
Updated