RockWoof
Check access before you go. Most sites listed here are old mines, quarries or prospects, and many are on private land or active mining claims. Get the landowner's permission, check the rules of the agency that manages any public land, and never enter mine workings. Locations are approximate.

Sketch map

Rump Pond Copper Prospect (Occurrence)Colton Hill Prospect + 5 more nearby (Prospect)Eagle Gray Quarry + 1 more nearby (Past Producer)Ledge Ridge (Occurrence)Peaked Hill Mine + 2 more nearby (Past Producer)Mcallister Occurrence + 7 more nearby (Occurrence)Styles Mtn. Prospect + 8 more nearby (Prospect)Orman Mcallister Prospect + 1 more nearby (Prospect)Spruce Mtn. Area Prospect (Prospect)Baldpate Mtn. Area Prospect + 1 more nearby (Prospect)Wheeler Mines + 1 more nearby (Past Producer)Donahue Prospect + 1 more nearby (Prospect)Harding Hill Prospect (Prospect)Stoneham + 4 more nearby (Occurrence)Aquamarine Occurrence + 6 more nearby (Occurrence)Lord Prospect + 1 more nearby (Prospect)Whitehall Mine + 2 more nearby (Past Producer)Old Graphite Mine + 1 more nearby (Past Producer)Plumbago Gem Mine (Producer)Bumpus Quarry + 6 more nearby (Past Producer)Knight Mine + 3 more nearby (Past Producer)Burnell Hill Occurrence + 6 more nearby (Occurrence)Cutler Mtn. Area (Prospect)Plumbago Mining Corp. + 15 more nearby (Past Producer)Elliot Mine + 1 more nearby (Past Producer)Uncle Tom Mine + 1 more nearby (Past Producer)Johnson Mine + 3 more nearby (Unknown)South Waterford Prospect (Prospect)Swift River Prospect + 3 more nearby (Occurrence)Partridge Peak Prospect + 3 more nearby (Occurrence)Black Mt. Quarry + 9 more nearby (Past Producer)Mt. Glines Mine + 1 more nearby (Past Producer)Woodstock Gold and Silver Mine (Occurrence)Immonen Ledge No. 2 Prospect + 3 more nearby (Prospect)Harvard Mine + 15 more nearby (Occurrence)Lone Star Mine (Past Producer)Gogan Prospect (Prospect)Oxford Prospect + 2 more nearby (Prospect)Woodstock Prospect + 2 more nearby (Unknown)Benson Quarry (Past Producer)Immonen Ledge No. 1 Prospect + 1 more nearby (Prospect)Whispering Pines Mine + 2 more nearby (Prospect)Perry Prospect + 1 more nearby (Prospect)Hedgehog Hill Mine (Past Producer)Mt. Mica + 17 more nearby (Unknown)United Spar Prospect + 6 more nearby (Occurrence)Glover Mine + 1 more nearby (Past Producer)Oxford Quarry + 1 more nearby (Past Producer)Ragged Jack Mtn. Area Prospect (Prospect)La Forest Mine (Past Producer)Basin Falls + 5 more nearby (Occurrence)Hill No. 4 Quarry + 6 more nearby (Past Producer)Jordan Prospect + 2 more nearby (Prospect)Clark Mine (Past Producer)
Past ProducerProducerProspectOccurrenceStatus unknown
54 paw pins; nearby sites are grouped into one pin. Hover or tap a pin for the site name. County outline: US Census Bureau cartographic boundary file (2023). Locations approximate.

Woof’s favorite find

Black Mountain Quarries

We picked it because its USGS record mentions 4 gem or collectible minerals (Beryl, Tourmaline, Quartz, Garnet) and 6 of our card minerals overall. That ties with 1 other site(s), so we broke the tie by mine status (past producers first), then USGS record quality, then name. USGS lists it as past producer. Minerals mentioned: Beryl, Tourmaline, Quartz, Garnet, Mica, Feldspar. Approx. location 44.586, -70.646. 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?

92
Past Producer

Produced ore or material at some point in the past.

68
Prospect

Explored or test-dug, with no recorded production.

38
Occurrence

The mineral was noted here, without development.

7
Producer

Was producing when the record was made.

5
Unknown

Status not recorded.

Status terms come from USGS MRDS records.

Mineral cards

Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.

Minerals recorded here

Beryl 11Spodumene 8Columbite 6Mica 5Pollucite 5Feldspar 5Tantalite 5Molybdenite 3Cassiterite 3Lepidolite 3Tourmaline 2Galena 2

Commodities

Feldspar 53Gemstone 49Beryllium 49Mica 32Lithium 11Gold 10Lead 8Tin 6Quartz 6Tantalum 6

Sites (first 40)

SiteCommodityMinerals recordedStatusApprox. location
South Twin Mtn Beryl ProspectBerylliumBerylOccurrence44.596, -70.609
Scotty MineBerylliumBerylPast Producer44.541, -70.727
Brown-Thurston Beryl ProspectBerylliumBeryl, Columbite, Tantalite, CassiteriteOccurrence44.580, -70.629
Bumpus QuarryBeryllium, Mica, Feldspar, CesiumBeryl, Mica, FeldsparPast Producer44.311, -70.781
Broome ProspectLithium, BerylliumBeryl, SpodumeneOccurrence44.543, -70.730
Black Mt. QuarryLithium, Feldspar, Mica, BerylliumCassiterite, Columbite, Beryl, Spodumene, Lepidolite, Feldspar, MicaPast Producer44.584, -70.646
Rump Pond Copper ProspectCopperChalcopyriteOccurrence45.210, -71.006
Nevel MineMica, FeldsparFeldspar, Beryl, Columbite, Tantalite, Spodumene, MicaPast Producer44.543, -70.722
Champion Consolidated MinesSilver, LeadGalenaPast Producer44.470, -70.562
Mt. Glines MineLeadGalena, SphaleritePast Producer44.470, -70.582
Crocker Hill Mine, North PitGoldGoldOccurrence44.274, -70.468
Swift River Gold Panning LocationGoldGoldUnknown44.735, -70.616
Crocker Hill Mine, South PitGraphite, MolybdenumGraphite, MolybdenitePast Producer44.273, -70.468
Bennet Feldspar QuarryFeldspar, GemstoneLepidolite, Beryl, Tantalite, Columbite, Feldspar, Quartz, TourmalineProducer44.291, -70.427
Mt. MicaMica, Gemstone, Feldspar, TinMica, Cassiterite, Lepidolite, Pollucite, Beryl, Feldspar, TourmalineUnknown44.294, -70.474
Basin FallsMolybdenumMolybdeniteOccurrence44.291, -70.402
Harvard MineMicaMolybdenite, Mica, Pollucite, Spodumene, BerylOccurrence44.287, -70.643
Kinglet QuarryCesiumPollucite, SpodumenePast Producer44.540, -70.724
Dunton Gem MineCesiumPollucite, Spodumene, Amblygonite, Tantalite, Columbite, Uraninite, BerylPast Producer44.541, -70.723
1580 Brook ProspetLithiumSpodumeneOccurrence44.542, -70.744
Crooker QuarryCesiumSpodumene, Columbite, Tantalite, PollucitePast Producer44.541, -70.724
Plumbago Mining Corp.Gemstone—Past Producer44.543, -70.723
Ledge RidgeCopper, Zinc, Lead—Occurrence45.198, -70.964
Woodstock Gold and Silver MineSilver, Lead, Copper, Gold—Occurrence44.395, -70.589
Stoneham——Occurrence44.257, -70.837
Partridge Peak ProspectTungsten—Occurrence44.634, -70.628
Hedgehog Hill MineGemstone—Past Producer44.469, -70.452
Wheeler MinesFeldspar—Past Producer44.392, -70.878
Mcallister OccurrenceBeryllium—Occurrence44.268, -70.918
Bowker MineGemstone—Prospect44.269, -70.472
United Spar ProspectFeldspar—Occurrence44.225, -70.445
Styles Mtn. ProspectBeryllium—Prospect44.239, -70.946
South Waterford ProspectMica—Prospect44.156, -70.712
Donahue ProspectBeryllium—Prospect44.337, -70.814
Hill No. 4 QuarryTin—Past Producer44.228, -70.414
Wardwell MineBeryllium—Past Producer44.263, -70.741
Clark MineMica—Past Producer44.460, -70.341
Aquamarine OccurrenceGemstone—Occurrence44.197, -70.815
Hayes Ledge ProspectBeryllium—Prospect44.297, -70.644
Ford Hill MineGemstone, Sulfur—Past Producer44.554, -70.666

Nearby counties

Androscoggin County · Cumberland County · Franklin County · Kennebec County · Sagadahoc County

Maine mineral guides

Back to all Maine counties.

Related articles

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