RockWoofFound alongside
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
11 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
Magnetite
Mohs 5.5–6.5. Black and strongly magnetic. Mindat
2 sites
Galena
Mohs 2.5–2.75. Heavy, silvery lead ore that breaks into cubes. Mindat
2 sites
Gold
Mohs 2.5–3. Soft, heavy and bright yellow; it doesn’t tarnish. Mindat
1 site
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
York County (3) · Chester County (3) · Berks County (2) · Delaware County (1) · Lancaster County (1) · Lebanon County (1)
Sites
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Grace Mine | Cobalt, Iron | Magnetite, Pyrite, Chalcopyrite, Covellite, Digenite | Past Producer | 40.172, -75.882 |
| Hokes Mine and Mill | Mica | Mica | Past Producer | 39.736, -76.839 |
| Lukens Steel Co Property Prospect | Mica | — | Occurrence | 39.975, -75.826 |
| Hokes Mine and Mill | Mica | — | Producer | 39.735, -76.836 |
| Media Quarry Co | Mica | — | Producer | 39.928, -75.382 |
| Gap Nickel Mine | — | — | Past Producer | 39.957, -76.086 |
| Fairville Mica Occurrence | Mica | — | Occurrence | 39.838, -75.629 |
| Cooper Mica Deposit | Mica | — | Past Producer | 39.738, -76.841 |
| E G Walters' Farm Prospect | Mica | — | Past Producer | 39.747, -75.903 |
| John Kauffman Farm Prospect | Mica | — | Prospect | 40.356, -75.778 |
| Cornwall Mine and Pellet Plant | — | — | Past Producer | 40.269, -76.403 |
Back to Rockhounding in Pennsylvania.
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 USGS ceased systematic updates to MRDS around 2011, so status and details may be out of date.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