RockWoofFound alongside
Magnetite
Mohs 5.5–6.5. Black and strongly magnetic. Mindat
372 sites
Pyrite
Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat
41 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
35 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
17 sites
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
12 sites
Garnet
Mohs 6.5–7.5. Usually deep red, round many-faced crystals. Mindat
11 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
Morris County (182) · Warren County (68) · Sussex County (48) · Hunterdon County (40) · Passaic County (30) · Somerset County (4)
Sites (first 60)
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Griggstown Mine | Copper | Chalcocite, Chalcopyrite, Chrysocolla, Copper, Cuprite, Malachite | Occurrence | 40.426, -74.612 |
| Banghart Mine | Iron | Chalcopyrite, Magnetite | Past Producer | 40.703, -74.916 |
| Sterling Hill | Zinc | Franklinite, Willemite, Zincite, Rhodonite, Tephroite, Schefferite, Sphalerite, Fowlerite, Magnetite | Past Producer | 41.083, -74.600 |
| Ringwood Mine-Cannon Mine | Iron | Hematite, Magnetite | Past Producer | 41.132, -74.276 |
| Hackelbarney Mine | Iron | Hematite, Magnetite | Past Producer | 40.770, -74.723 |
| Scrub Oaks Mine | Iron | Hematite, Magnetite | Past Producer | 40.891, -74.601 |
| Barton Mine/Belvidere Group/Roseberry/Shoemaker/Fittz/Jenny Jumpbelt | Iron | Limonite, Magnetite | Past Producer | 40.810, -75.041 |
| Swayze's Hematite Mine | Iron | Limonite, Magnetite | Past Producer | 40.939, -74.938 |
| Wright Mine | Iron | Limonite, Magnetite | Past Producer | 40.642, -75.070 |
| Cline Mine/Smith's Opening/Thatcher/Slack Mines | Iron | Limonite, Magnetite | Past Producer | 40.683, -75.075 |
| David Horton Mine | Iron | Magnetite | Past Producer | 40.841, -74.603 |
| Eureka Mine | Iron | Magnetite | Past Producer | 40.905, -74.767 |
| Wintermute Mine | Iron | Magnetite | Past Producer | 40.892, -74.819 |
| Frenchs Mine | Iron | Magnetite | Past Producer | 40.922, -74.777 |
| Bryant Mine | Iron | Magnetite | Past Producer | 40.894, -74.806 |
| Haggerty's Farm | Iron | Magnetite | Past Producer | 40.896, -74.801 |
| Duckworth Farm | Iron | Magnetite | Past Producer | 40.612, -75.084 |
| Martin Farm | Iron | Magnetite | Occurrence | 40.624, -75.050 |
| Auble Mine | Iron | Magnetite | Past Producer | 40.732, -74.644 |
| Wortman Mine | Iron | Magnetite | Past Producer | 40.738, -74.722 |
| Bartles Mine | Iron | Magnetite | Past Producer | 40.729, -74.742 |
| Kean Mine | Iron | Magnetite | Occurrence | 40.800, -74.677 |
| Cooper Mine | Iron | Magnetite | Past Producer | 40.797, -74.680 |
| Sweayze Mine | Iron | Magnetite | Past Producer | 40.793, -74.686 |
| Gulick Farm Mines | Iron | Magnetite | Past Producer | 40.775, -74.717 |
| Langdon Mine | Iron | Magnetite | Past Producer | 40.755, -74.731 |
| Pitney Mine | Iron | Magnetite | Past Producer | 40.759, -74.734 |
| Child Mine | Iron | Magnetite | Past Producer | 40.765, -74.711 |
| Black Hills Mine | Iron | Magnetite | Past Producer | 40.866, -74.615 |
| Excelsior Mine | Iron | Magnetite | Past Producer | 40.886, -74.808 |
| Hager Mine | Iron | Magnetite | Past Producer | 40.600, -75.132 |
| Sharps Mine | Iron | Magnetite | Past Producer | 40.661, -74.870 |
| Carter Mine | Iron | Magnetite | Past Producer | 40.719, -75.118 |
| Charles King Mine | Iron | Magnetite | Past Producer | 40.856, -74.615 |
| Stanhope/Budd Mine/Roseville/Hude/Wright/Haggerty Mines | Iron | Magnetite | Past Producer | 40.917, -74.716 |
| Cobb Mine | Iron | Magnetite | Past Producer | 40.686, -74.963 |
| Stony Brook Mine/ Pikes Peak/ Wood/ Split Rock Pond | Iron | Magnetite | Past Producer | 40.992, -74.416 |
| Rockaway Valley | Iron | Magnetite | Past Producer | 40.949, -74.408 |
| Auble Mine | Iron | Magnetite | Past Producer | 40.899, -74.644 |
| Connet Water Street Mine | Iron | Magnetite | Past Producer | 40.790, -74.577 |
| Wood Hull Mine | Iron | Magnetite | Past Producer | 40.776, -74.695 |
| Van Syckle Church Mine | Iron | Magnetite | Past Producer | 40.658, -74.979 |
| Crestmore Mine | Iron | Magnetite | Past Producer | 40.748, -74.810 |
| Foulon Mine | Iron | Magnetite | Past Producer | 40.855, -74.616 |
| Welch Farm Exploration | Iron | Magnetite | Past Producer | 40.727, -74.734 |
| Fox Hill Mine | Iron | Magnetite | Past Producer | 40.717, -74.779 |
| Burrill Mine | Iron | Magnetite | Past Producer | 40.706, -74.794 |
| Cokesbury Mine | Iron | Magnetite | Past Producer | 40.684, -74.835 |
| Annandale Mine | Iron | Magnetite | Past Producer | 40.652, -74.870 |
| Old Furnace Mine | Iron | Magnetite | Past Producer | 40.673, -74.857 |
| Hager Mine | Iron | Magnetite | Past Producer | 40.600, -75.133 |
| George Mine | Iron | Magnetite | Past Producer | 40.839, -74.614 |
| Mount Olive Mines | Iron | Magnetite | Past Producer | 40.845, -74.733 |
| Stephens Mine | Iron | Magnetite | Past Producer | 40.846, -74.732 |
| Dickinson's Mine | Iron | Magnetite | Past Producer | 40.810, -74.811 |
| Marsh Mine | Iron | Magnetite | Past Producer | 40.811, -74.816 |
| Sharp Mine | Iron | Magnetite | Past Producer | 40.778, -74.854 |
| Pidcock Mine | Iron | Magnetite | Past Producer | 40.774, -74.874 |
| Fisher Mine | Iron | Magnetite | Past Producer | 40.799, -74.845 |
| Smith Mine | Iron | Magnetite | Past Producer | 40.873, -74.802 |
Back to Rockhounding in New Jersey.
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