RockWoofFound alongside
Feldspar
Mohs 6–6.5. Blocky crystals with flat cleavage faces. Mindat
18 sites
Quartz
Mohs 7. Six-sided points; smoky quartz is NH’s state gem. Mindat
13 sites
Mica
Mohs 2–3. Peels into thin, flexible, shiny sheets. Mindat
5 sites
Pyrite
Mohs 6–6.5. Brassy “fool’s gold,” often cubic. Mindat
4 sites
Fluorite
Mohs 4. Cubes in purple, green or yellow; many glow under UV. Mindat
4 sites
Copper
Mohs 2.5–3. Native copper is soft and turns green as it weathers. Mindat
4 sites
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
By county
Llano County (5) · Burnet County (3) · Presidio County (3) · El Paso County (2) · Schleicher County (1) · Hudspeth County (1) · Brewster County (1) · Culberson County (1) · Gillespie County (1)
Sites
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| Baringer Hill Mine | REE, Feldspar, Fluorine-Fluorite, Zirconium, Beryllium | Allanite, Chalcopyrite, Fergusonite, Gadolinite, Molybdenite, Polycrase, Sphalerite, Yttrialite | Past Producer | 30.778, -98.433 |
| Kiam Prospect | Bismuth, Molybdenum, Gold | Bismuthinite, Feldspar, Molybdenite, Muscovite | Occurrence | 30.634, -98.526 |
| Blackshaft Mine | Copper, Silver | Bornite, Chalcocite, Chalcopyrite, Pyrite, Pyrrhotite | Past Producer | 31.139, -104.925 |
| Mammoth Prospect | Uranium | Carnotite | Occurrence | 30.447, -104.805 |
| El Paso Mine | Tin | Cassiterite, Wolframite | Past Producer | 31.936, -106.488 |
| Bird Mine | Silver, Lead, Molybdenum, Copper, Zinc | Chalcopyrite, Goethite, Hematite, Pyrite, Sphalerite | Producer | 30.343, -103.517 |
| Unnamed Prospect | Copper | Chrysocolla, Malachite | Occurrence | 29.904, -104.570 |
| Casa Piedra Deposit | Zeolites | Clinoptilolite | Occurrence | 29.739, -104.042 |
| Clear Creek Prospect | Feldspar | Feldspar | Occurrence | 30.800, -98.323 |
| Williams Mine | Feldspar | Feldspar | Past Producer | 30.669, -98.474 |
| Althaus Mine | Feldspar | Feldspar | Past Producer | 30.414, -98.619 |
| Central Texas Iron Ore Resource | — | Goethite, Hematite | Occurrence | 31.375, -99.500 |
| Badu Hill Mine | Feldspar | Microcline | Past Producer | 30.724, -98.475 |
| Alamo Mica Quarry | Mica | Muscovite | Producer | 30.844, -104.902 |
| Griffy Mn Prospect | Manganese | Piedmontite, Spessartite | Occurrence | 30.835, -98.676 |
| Franklin Mt Tin Deposits | — | — | Past Producer | 31.936, -106.488 |
| Clear Creek | Feldspar | — | Unknown | 30.800, -98.325 |
| Disintegrated Feldspar | Feldspar | — | Unknown | 30.634, -98.408 |
Back to Rockhounding in Texas.
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