RockWoofSketch map
Woof’s favorite find
Natl. Briquette Corp. Plant
We picked it because its USGS record mentions 1 gem or collectible mineral (Fluorite) and 1 of our card minerals overall. No other named site here scores as high on both counts. USGS lists it as producer for Fluorine-Fluorite. Minerals mentioned: Fluorite. Approx. location 41.638, -87.478. 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?
A processing plant site.
Status not recorded.
Was producing when the record was made.
Status terms come from USGS MRDS records.
Mineral cards
Fluorite
Mohs 4. Cubes in purple, green or yellow; many glow under UV. Mindat
1 site
Counts are sites whose USGS record mentions the mineral or commodity. Hardness from Mindat.
Minerals recorded here
No individual minerals are listed in these records.
Commodities
Sulfur 3Antimony 1Lead 1Iron 1Fluorine-Fluorite 1Chromium 1Sites
| Site | Commodity | Minerals recorded | Status | Approx. location |
|---|---|---|---|---|
| East Chicago Plant-Energy Coop. | Sulfur | — | Unknown | 41.638, -87.478 |
| (Facility) Us Steel Lead Smeltr & Refinery | Antimony, Lead | — | Plant | 41.638, -87.478 |
| J & L Steel/ Indiana Harbor Works | Iron | — | Unknown | 41.638, -87.478 |
| Natl. Briquette Corp. Plant | Fluorine-Fluorite | — | Producer | 41.638, -87.478 |
| Dean H. Mitchell Generating Station | Sulfur | — | Plant | 41.638, -87.407 |
| Harbison-Walker/ Hammond, Ind. | Chromium | — | Producer | 41.630, -87.505 |
| (Facility) Amoco/ Whiting Refinery | Sulfur | — | Plant | 41.675, -87.487 |
Nearby counties
La Porte County · Pulaski County · Newton County · Cass County · Carroll County
Indiana mineral guides
Back to all Indiana 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 USGS ceased systematic updates to MRDS around 2011, so status and details may be out of date.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