RockWoofSketch map
Woof’s favorite find
Kibby Prospect
We picked it because its USGS record mentions 2 gem or collectible minerals (Gold, Silver) and 2 of our card minerals overall. No other named site here scores as high on both counts. USGS lists it as occurrence for Gold. Minerals mentioned: Gold, Silver. Approx. location 45.346, -70.545. 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?
The mineral was noted here, without development.
Produced ore or material at some point in the past.
Explored or test-dug, with no recorded production.
Was producing when the record was made.
Status terms come from USGS MRDS records.
Mineral cards
Gold
Mohs 2.5–3. Soft, heavy and bright yellow; it doesn’t tarnish. Mindat
3 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
Pyrite
Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat
1 site
Silver
Mohs 2.5–3. Native silver tarnishes black. Mindat
1 site
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
Minerals recorded here
Gold 2Chromite 1Spodumene 1Graphite 1Commodities
Gold 3Granite 3Tungsten 3Sulfur 2Zinc 2Chromium 1Lithium 1Graphite 1Lead 1Tantalum 1Sites
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Unnamed Chromium Occurrence | Chromium | Chromite | Occurrence | 45.392, -70.794 |
| Nile Brook Gold Panning Location | Gold | Gold | Occurrence | 44.948, -70.635 |
| Boil Mountain | Gold | Gold | Occurrence | 45.241, -70.726 |
| Phillips Graphite Mine | Graphite | Graphite | Past Producer | 44.858, -70.461 |
| Harden-Keith-Small 1580 Prospect | Lithium | Spodumene | Occurrence | 44.847, -70.661 |
| Wing Mine | Sulfur | — | Past Producer | 44.996, -70.661 |
| Beal Mine | Zinc | — | Past Producer | 44.633, -70.469 |
| Beisaw Quarry | Granite | — | Past Producer | 44.558, -70.249 |
| Wing Mine | — | — | Past Producer | 44.916, -70.698 |
| Farmington Prospect | Tungsten | — | Occurrence | 44.680, -70.154 |
| Stone Rock Briggs Mine | Lead, Zinc | — | Past Producer | 44.640, -70.473 |
| Farmington Falls Prospect | Tungsten | — | Occurrence | 44.616, -70.085 |
| American Stone Company Quarry | Granite | — | Past Producer | 44.545, -70.227 |
| Mountain Brook Prospect | Tungsten | — | Occurrence | 44.772, -70.674 |
| Hardin-Keith-Small Prospect | Tantalum | — | Prospect | 44.852, -70.663 |
| Wing Hill Mine | Garnet | — | Producer | 44.969, -70.655 |
| Me and N H Granite Corp Quarries | Granite | — | Past Producer | 44.544, -70.231 |
| Kibby Prospect | Gold | — | Occurrence | 45.346, -70.545 |
| Maxwell-Briggs Prospect | Sulfur | — | Occurrence | 44.624, -70.436 |
Nearby counties
Somerset County · Oxford County · Kennebec County · Androscoggin County · Piscataquis County
Maine mineral guides
Back to all Maine 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