St. Louis (calcite area): Calcite & Millerite Rockhounding in Saint Louis County, Missouri

Updated June 2026

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.

Quick details

Access: Public area
County: Saint Louis County
State: Missouri
Nearest road: Eagle Rock Cove
Postcode: 63088
Coordinates: 38.53785, -90.49309

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.

Best time to visit St. Louis (calcite area)

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).

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.

Sources & 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.

Sources: RockHoundR public spot dataset, app land overlays, and local agency review before each trip.

Found at St. Louis (calcite area)

Each chip 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).

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.

St. Louis (calcite area) FAQ

Where is St. Louis (calcite area)?+

St. Louis (calcite area) is in Saint Louis County, Missouri, at 38.53785, -90.49309. Nearest road: Eagle Rock Cove.

What rocks and minerals can you find at St. Louis (calcite area)?+

St. Louis (calcite area) is reported to produce Calcite, Millerite, Quartz.

Is collecting allowed at St. Louis (calcite area)?+

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. Always confirm current rules with the managing agency before a trip.

What tools should I bring to St. Louis (calcite area)?+

A rock hammer, a small pry bar, gloves, and safety glasses cover most crystal ground. A screen helps in loose pocket soil, and newspaper protects points on the way out.

When is the best time to visit St. Louis (calcite area)?+

The most comfortable months at St. Louis (calcite area) are February to December.

How do I get to St. Louis (calcite area)?+

Open the directions link to navigate to 38.53785, -90.49309 in Google Maps. The nearest road is Eagle Rock Cove.

More rockhounding in Missouri

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Open St. Louis (calcite area) on the map

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