St. Louis (calcite area): Calcite & Millerite Rockhounding in Saint Louis County, Missouri
- Minerals reported
- 3
- Elevation
- 490 ft
- Best months
- February to December
St. Louis (calcite area) is a mapped rockhounding spot in Saint Louis County, Missouri. Reported finds include calcite, millerite, quartz. Below: coordinates, access notes, nearby spots, and trip-planning links.
Plan your visit
Generally open to casual rockhounding
- County
- Saint Louis County
- State
- Missouri
- Nearest road
- Eagle Rock Cove
- Postcode
- 63088
- Coordinates
- 38.53785, -90.49309
Coordinates are approximate. Confirm the exact ground in the RockHoundR app, where land overlays show which agency manages the area.
Land & collecting status
Generally open to casual rockhounding
Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig.
Public-land rules vary by agency, season, and field office. The RockHoundR app pulls live BLM, USFS, NPS, and tribal overlays so you can see exactly which agency manages the ground at this spot.
Best time to visit St. Louis (calcite area)
Comfortable months (45 to 90°F highs)
Best months: February to December. Typical highs run 89°F in midsummer and 40°F in midwinter, with winter lows near 22°F.
Climate normals: NOAA 1991-2020 monthlies, ST CHARLES 7 SSW station (10 mi away).
Geology at St. Louis (calcite area)
This spot sits on ground mapped as limestone that formed roughly 360 to 325 million years ago. Carbonate rock like this dissolves and weathers readily, so fresh road cuts, quarries, and creek exposures are typically the most productive ground.
- Age
- 360–325 Ma (Mississippian)
- Rock types
- limestone
- Elevation
- 490 ft
Geologic mapping via Macrostrat and the underlying state geological survey maps (CC BY 4.0). Bedrock at the surface can vary within a mapped unit.
Today's weather
Is today a good day to go?
The app shows live weather, recent rain, and a daily rockhounding score for St. Louis (calcite area).
Get the appSources & verification
Spot details combine the public RockHoundR location dataset, normalized mineral labels, agency land-status checks in the app, and community submissions. Coordinates are approximate until verified in the field.
- Missouri Geological Survey
- Mark Twain National Forest
- Missouri State Parks rules
- Community submissions reviewed against published agency rules
Found at St. Louis (calcite area)
Each name opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.
Nearby rockhounding spots
Other rockhounding spots within driving distance of St. Louis (calcite area).
- St. Louis (barite area)Saint Louis County, Missouri · 3 mi awayBarite, Calcite, Goethite
- Jefferson CountyJefferson County, Missouri · 7 mi awayCalcite Nodule, Sphalerite
- ArnoldJefferson County, Missouri · 10 mi awayGeode, Dolomite, Marcasite
- ChesterfieldSaint Charles County, Missouri · 12 mi awayGarnet, Staurolite
- Saint Charles QuarrySaint Charles County, Missouri · 15 mi awayYellow Calcite, Green Calcite, Chert Nodule
- Defiance QuarrySaint Charles County, Missouri · 17 mi awayYellow Calcite, White Calcite, Goethite
- Weber QuarrySaint Charles County, Missouri · 23 mi awayGeode, Fluorite, Millerite
- FlorissantSaint Louis County, Missouri · 25 mi awayCalcite, Celestite
Across the state line from St. Louis (calcite area)
St. Louis (calcite area) is close enough to the Missouri border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.
- SpartaRandolph County, Illinois · 52 mi awayPyrite, Fossil
- Mt. Vernon AreaJefferson County, Illinois · 75 mi awayDiamond
St. Louis (calcite area) FAQ
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More rockhounding in Missouri
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