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

Gabimichigama Lake Deposit (Unknown)Lake Saganaga-Gold Island Prospect (Unknown)Rove Slate Area Prospect Pits (Unknown)Gunflint Corridor West (Occurrence)Tuscarora Lake Prospect (Unknown)Titaniferous Magnetite Prospect #6 (Occurrence)Smoke Lake Deposit (Unknown)Old Silver Mine (Past Producer)Gunflint Corridor East (Occurrence)Dawkins Lake Prospect + 1 more nearby (Unknown)Loon Lake + 1 more nearby (Occurrence)Tucker Lake Deposit + 4 more nearby (Unknown)Tucker-Poplar Lake Deposit (Prospect)Pillsbery Lake Prospect (Unknown)Titaniferous Magnetite Pit No 2 + 1 more nearby (Occurrence)Poplar Lake Deposit (Unknown)Old Spaulding Mine (Occurrence)Mcfarland Lake Prospect (Occurrence)Graphite Pit No. 2 + 2 more nearby (Unknown)Graphite Pit No. 1 + 1 more nearby (Unknown)Susie Island Copper Veins (Past Producer)
Past ProducerProducerProspectOccurrenceStatus unknown
21 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

Mcfarland Lake Prospect

We picked it because its USGS record mentions 3 gem or collectible minerals (Quartz, Gold, Silver) and 4 of our card minerals overall. No other named site here scores as high on both counts. USGS lists it as occurrence for Silver, Gold. Minerals mentioned: Quartz, Gold, Pyrite, Silver. Approx. location 48.064, -90.103. 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?

16
Occurrence

The mineral was noted here, without development.

12
Unknown

Status not recorded.

2
Past Producer

Produced ore or material at some point in the past.

1
Prospect

Explored or test-dug, with no recorded production.

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

Ilmenite 8Magnetite 8Chalcopyrite 6Arsenopyrite 3Bornite 3Gold 3Pyrite 2Pentlandite 2Graphite 2Silver 1Cubanite 1Pyrrhotite 1

Commodities

Iron 14Titanium 9Metal 8Gold 4Graphite 4Silver 3Copper 3Arsenic 2Cobalt 2Vanadium 1

Sites

SiteCommodityMinerals recordedStatusApprox. location
Cobalt ProspectArsenic, CobaltArsenopyriteOccurrence48.072, -90.673
Blankenburg-Whiteside ProspectCobaltArsenopyrite, ChalcopyriteOccurrence48.074, -90.742
Gunflint Corridor East—Bornite, ChalcopyriteOccurrence48.083, -90.740
Gunflint Corridor West—Bornite, ChalcopyriteOccurrence48.086, -90.847
Susie Island Copper VeinsCopper, SilverChalcopyrite, Bornite, Pyrite, Covellite, ChalcocitePast Producer47.977, -89.575
Loon Lake—Chalcopyrite, Pyrite, ArsenopyriteOccurrence48.067, -90.717
Rove Slate Area Prospect Pits—Cubanite, PentlanditeUnknown47.983, -90.919
Old Spaulding MineGoldGoldOccurrence48.049, -90.214
Lake Saganaga-Gold Island ProspectGoldGoldUnknown48.202, -90.939
Mcfarland Lake ProspectSilver, GoldGold, SilverOccurrence48.064, -90.103
Graphite Pit No. 2GraphiteGraphiteUnknown47.982, -89.747
Graphite Pit No. 1GraphiteGraphiteUnknown47.985, -89.577
Gabimichigama Lake DepositIron, Titanium, MetalIlmenite, MagnetiteUnknown48.042, -91.021
Pillsbery Lake ProspectIron, Titanium, MetalIlmenite, MagnetiteUnknown48.017, -90.577
Iron Lake DepositIron, Titanium, MetalIlmenite, MagnetiteUnknown48.066, -90.625
Smoke Lake DepositIron, Titanium, MetalIlmenite, MagnetiteUnknown47.909, -90.823
Tucker Lake DepositIron, Titanium, MetalIlmenite, MagnetiteUnknown48.061, -90.673
Poplar Lake DepositIron, Titanium, MetalIlmenite, MagnetiteUnknown48.034, -90.512
Tuscarora Lake ProspectIron, Titanium, MetalIlmenite, MagnetiteUnknown48.039, -90.859
Dawkins Lake ProspectIron, Titanium, MetalMagnetite, IlmeniteUnknown48.055, -90.775
Green Prospect PitCopperPentlandite, Pyrrhotite, ChalcopyriteOccurrence47.978, -89.763
Old Silver MineSilver—Past Producer47.891, -90.795
Titaniferous Magnetite Pit No 4Iron—Occurrence48.066, -90.667
Titaniferous Magnetite Pit No 3Iron—Occurrence48.068, -90.641
Titaniferous Magnetite Pit No 2Iron—Occurrence48.059, -90.532
Graphite Pit No 2Graphite—Occurrence47.982, -89.747
Titaniferous Magnetite Pit No 5Iron—Occurrence48.065, -90.721
Titaniferous Magnetite Prospect #6Iron—Occurrence47.892, -90.852
Graphite Pit No 1Graphite—Occurrence47.985, -89.577
Titaniferous Magnetite Pit No 1Iron—Occurrence48.055, -90.528
Tucker-Poplar Lake DepositTitanium, Vanadium—Prospect48.054, -90.608

Nearby counties

Lake County · St. Louis County · Koochiching County · Itasca County · Cass County

Minnesota mineral guides

Back to all Minnesota 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