About this location
There are two different "Weber Quarry" sites tied to Fred Weber, Inc., a St. Louis-area construction materials company, and this DB entry's coordinates point to the wrong one for the mineral specimens listed. The batch coordinate (near Lake Saint Louis, St. Charles County) lands on Fred Weber's former quarry off West Terra Lane in O'Fallon — a limestone/aggregate pit that closed around 2010, with the city of O'Fallon having since approved a site plan to redevelop the property. The mineralogically significant "Weber Quarry" — the one mindat documents for millerite, fluorite, and calcite geodes — is a separate Fred Weber, Inc. pit roughly 30 miles southeast in St. Louis County, near Baumgartner Road in the Mehlville/Lemay area. Same company, same recurring quarry name, two unrelated pits.
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Found Here
At the true mineral locality (St. Louis County, Baumgartner Road — not this coordinate): millerite (rare hair-like nickel sulfide crystals), fluorite, and calcite documented in geodes from Mississippian-age limestone, per mindat.
At the coordinate this listing actually points to (O'Fallon, St. Charles County): no mineral specimens are documented. It operated as a limestone/aggregate quarry until closing around 2010.
Difficulty
Getting there
Not applicable either way — the O'Fallon site is a closed, private quarry now in redevelopment, and no public/club access path was found for the St. Louis County mineral locality either.
Collecting here
Not applicable. Neither site has a confirmed public collecting arrangement.
Know before you go
This is access: closed. The coordinate given for this listing is a private, closed commercial quarry undergoing redevelopment — not open to visitors under any circumstance. Separately, the genuinely mineral-documented "Weber Quarry" in St. Louis County has no confirmed public or mineral-club access path found either, unlike some other regional quarries that run organized field-trip programs.
Location on Map
Coordinates: 38.80434, -90.74286
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Frequently asked questions
Is Weber Quarry in Missouri open to rockhounds?
No. The coordinates in this listing point to a closed, private limestone quarry near O'Fallon, Missouri that's being redeveloped — not the mineral-documented Weber Quarry, and neither site has confirmed public access.
Where is the real millerite and fluorite "Weber Quarry" in Missouri?
The mineral-documented Weber Quarry (millerite, fluorite, calcite geodes) is in St. Louis County near Baumgartner Road, roughly 30 miles southeast of the coordinates given for this listing — a different Fred Weber, Inc. pit entirely.
Why do two different quarries in Missouri share the name "Weber Quarry"?
Both are operated by the same company, Fred Weber, Inc., which runs multiple aggregate quarries across the St. Louis region — the name repeats because the operator does, not because it's one site.
⚠️ Always verify current regulations, weather conditions, and access requirements before visiting any location. Information provided is based on community submissions and may not be current or accurate.
Sources
- https://www.mindat.org/loc-44251.html and https://www.mindat.org/locentry-208841.html (via search snippet) — Weber Quarry, St. Louis County, millerite/fluorite documentation.
- https://www.midriversnewsmagazine.com/news/o-fallon-approves-site-plan-for-reclaiming-fred-weber-quarry-near-i-70/article_e0bc3585-39ae-5520-bdfe-24e6fc32d0b9.html — O'Fallon Fred Weber quarry redevelopment/site plan approval.
- https://www.costar.com/article/1808805382/fred-weber-quarry-digs-missouri-location-so-much-it-bought-the-site and Waze/Yellow Pages listings for 1600 W Terra Ln, O'Fallon — quarry closure (~2010) and location confirmation.
- bigdatacloud.net reverse geocode (38.80434, -90.74286) — confirmed St. Charles County, near Lake Saint Louis/O'Fallon.
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