Rockhounding in Williamson County, TN: 89 USGS Mineral Sites (2026)

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

Past ProducerProducerProspectOccurrenceStatus unknown

36 paw pins; nearby sites are grouped into one pin. Hover or tap a pin for the site name. 6 site(s) with USGS coordinates outside the outline are not pinned. County outline: US Census Bureau cartographic boundary file (2023). Locations approximate.

Woof’s favorite find

Holt Mine

We picked it because its USGS record mentions 1 gem or collectible mineral (Fluorite) and 2 of our card minerals overall. No other named site here scores as high on both counts. USGS lists it as past producer for Lead. Minerals mentioned: Galena, Fluorite. Approx. location 35.951, -86.706. 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?

Past Producer

Produced ore or material at some point in the past.

Unknown

Status not recorded.

Producer

Was producing when the record was made.

Prospect

Explored or test-dug, with no recorded production.

Occurrence

The mineral was noted here, without development.

Status terms come from USGS MRDS records.

Mineral cards

Fluorite
Mohs 4. Cubes in purple, green or yellow; many glow under UV. Mindat
4 sites
Galena
Mohs 2.5–2.75. Heavy, silvery lead ore that breaks into cubes. Mindat
1 site

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

Minerals recorded here

Barite 1Fluorite 1Galena 1Sphalerite 1

Commodities

Phosphorus-Phosphates 72Fluorine-Fluorite 2Lead 1Aluminum 1

Sites (first 40)

Site	Commodity	Minerals recorded	Status	Approx. location
Holt Mine	Lead	Barite, Fluorite, Galena, Sphalerite	Past Producer	35.951, -86.706
Huddleston #304	—	—	Occurrence	35.988, -86.764
Truett Ps-20	Phosphorus-Phosphates	—	Producer	35.913, -86.898
Smithson Ps-21	Phosphorus-Phosphates	—	Producer	35.927, -86.898
Battlefield Pewitt #580	—	—	Occurrence	35.943, -86.929
Prospect Gasser #362	—	—	Occurrence	35.988, -86.771
Prospect Harper #351	—	—	Occurrence	35.983, -86.804
Battlefield Hood #862	—	—	Occurrence	35.905, -86.912
Battlefield Number 422 Pit	Phosphorus-Phosphates	—	Past Producer	35.361, -86.909
Monoco Number 392 Pit	Phosphorus-Phosphates	—	Past Producer	35.950, -86.774
Momoco Number 343 Pit	Phosphorus-Phosphates	—	Past Producer	35.966, -86.767
Dallas Number 431 Pit	Phosphorus-Phosphates	—	Past Producer	35.894, -86.857
Monoco Number 349 Pit	Phosphorus-Phosphates	—	Past Producer	35.973, -86.784
Truett Pit Ps-20	Phosphorus-Phosphates	—	Past Producer	35.913, -86.898
Battlefield Number 1062 Pit	Phosphorus-Phosphates	—	Past Producer	35.933, -86.898
Short Estate Number 752 Pit	Phosphorus-Phosphates	—	Past Producer	35.935, -86.919
Short Number 1 Pit Ps-22	Phosphorus-Phosphates	—	Past Producer	35.927, -86.893
Wilco Number 252 Pit	Phosphorus-Phosphates	—	Past Producer	35.913, -86.837
Wilco Number 253 Pit	Phosphorus-Phosphates	—	Past Producer	35.928, -86.794
Monco Number 345 Pit	Phosphorus-Phosphates	—	Past Producer	35.961, -86.764
Anthony Pit	Phosphorus-Phosphates	—	Past Producer	35.952, -86.847
Monoco Number 361 Pit	Phosphorus-Phosphates	—	Past Producer	35.955, -86.763
Wilco Number 258 Pit	Phosphorus-Phosphates	—	Past Producer	35.914, -86.841
Smithson Pit Ps-21	Phosphorus-Phosphates	—	Past Producer	35.927, -86.898
Battlefield Number 697 Pit	Phosphorus-Phosphates	—	Past Producer	35.971, -86.909
Short No. 1 Ps-22	Phosphorus-Phosphates	—	Producer	35.927, -86.893
Dallas	—	—	Prospect	35.891, -86.853
Monsanto Phosphate Deposit No.22	Phosphorus-Phosphates	—	Unknown	35.935, -86.809
Monoco No 343 Pit	Phosphorus-Phosphates	—	Past Producer	35.967, -86.767
Stauffer Phosphate Deposit No.3	Phosphorus-Phosphates	—	Unknown	35.824, -86.918
Tva Phosphate Deposit No.33	Phosphorus-Phosphates	—	Unknown	35.952, -86.906
Tillman No 113	Aluminum	—	Past Producer	35.904, -86.928
Monoco Number 361 Pit	Phosphorus-Phosphates	—	Past Producer	35.955, -86.763
Monsanto Phosphate Deposit No.11	Phosphorus-Phosphates	—	Unknown	35.816, -86.911
Hooker Chemical Company No.4	Phosphorus-Phosphates	—	Unknown	35.828, -86.967
Wilco Number 252 Pit	Phosphorus-Phosphates	—	Past Producer	35.913, -86.837
Monsanto Phosphate Deposit No.12	Phosphorus-Phosphates	—	Unknown	35.851, -86.960
Monaco	Phosphorus-Phosphates	—	Producer	35.933, -86.898
Monoco No 345 Pit	Phosphorus-Phosphates	—	Past Producer	35.961, -86.764
Tva Phosphate Deposit No.31	Phosphorus-Phosphates	—	Unknown	35.957, -86.915

Nearby counties

Cheatham County · Davidson County · Maury County · Rutherford County · Hickman County

Tennessee mineral guides

Back to all Tennessee counties.

Is It Legal to Collect Rocks on Public Land? BLM, Forest Service and National Park Rules

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 October 2026

Rockhounding in Williamson County, Tennessee