RockWoofSketch map
Woof’s favorite find
Colliers Mills-Keswick Grove
We picked it because its USGS record mentions 2 gem or collectible minerals (Tourmaline, Garnet) and 2 of our card minerals overall. No other named site here scores as high on both counts. USGS lists it as occurrence for Zirconium, Titanium, Metal. Minerals mentioned: Tourmaline, Garnet. Approx. location 40.067, -74.450. 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?
Was producing when the record was made.
Produced ore or material at some point in the past.
The mineral was noted here, without development.
Status not recorded.
Explored or test-dug, with no recorded production.
Status terms come from USGS MRDS records.
Mineral cards
Tourmaline
Mohs 7–7.5. Long striated crystals, often black (schorl) or green and pink (elbaite). Mindat
2 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
1 site
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
Ilmenite 4Rutile 2Commodities
Titanium 10Metal 7Zirconium 3Magnesite 1Graphite 1Sites
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Lakehurst | Zirconium, Titanium, Metal | Ilmenite | Producer | 40.067, -74.333 |
| Lakehurstasarcodeposit | Titanium, Metal | Ilmenite | Occurrence | 40.050, -74.333 |
| Lakehurst Deposit | Titanium, Metal | Ilmenite, Rutile | Producer | 40.067, -74.333 |
| Manchester Deposit | Titanium, Metal | Ilmenite, Rutile | Producer | 39.983, -74.350 |
| Colliers Mills-Keswick Grove | Zirconium, Titanium, Metal | — | Occurrence | 40.067, -74.450 |
| Glidden-Durkee, Div of Sc | Titanium, Metal | — | Past Producer | 40.052, -74.332 |
| Lakehurst Mine | Titanium, Metal | — | Producer | 40.217, -74.350 |
| Lakehurst Mine | Titanium | — | Past Producer | 40.030, -74.190 |
| Manchester Unit & Plant | Titanium | — | Past Producer | 39.985, -74.345 |
| Reade Mfg/ Lakehurst, N.J. | Magnesite | — | Unknown | 40.014, -74.313 |
| American Graphite/ Lakehurst, N.J. | Graphite | — | Unknown | 40.014, -74.313 |
| Colliers Mills-Kerswick Prospect | Titanium | — | Prospect | 40.067, -74.450 |
Fossil collections
The Paleobiology Database lists 15 fossil collection records in Ocean County. These are research records, not public dig sites.
Nearby counties
Mercer County · Middlesex County · Camden County · Union County · Somerset County
New Jersey mineral guides
- Quartz in New Jersey
- Garnet in New Jersey
- Mica in New Jersey
- Feldspar in New Jersey
- Magnetite in New Jersey
- Pyrite in New Jersey
Back to all New Jersey 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