Chesterfield: Garnet & Staurolite Rockhounding in Saint Charles County, Missouri

Updated July 2026

Chesterfield is a mapped rockhounding spot in Saint Charles County, Missouri. Reported finds include garnet, staurolite. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Permission required
County: Saint Charles County
State: Missouri
Postcode: 63304
Coordinates: 38.68706, -90.61777

Geology at Chesterfield

This spot sits on ground mapped as clay, silt, and sand that formed within roughly the last 12,000 years. Loose deposits like these are float-collecting ground: erosion keeps moving durable rocks and minerals into gravel bars, cutbanks, and washes.

Age: < 1 Ma (Holocene)
Rock types: clay, silt, and sand
Elevation: 450 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 Chesterfield

Best months: February to December. Typical highs run 90°F in midsummer and 41°F in midwinter, with winter lows near 22°F.

Climate normals: NOAA 1991-2020 monthlies, ST LOUIS SPIRIT OF ST LOUIS AP station (3 mi away).

Land & collecting status

Permission required before collecting

Requires landowner or agency permission before any collecting. Do not enter without explicit authorization.

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 Chesterfield

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 Chesterfield.

Across the state line from Chesterfield

Chesterfield 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.

Chesterfield FAQ

Where is Chesterfield?+

Chesterfield is in Saint Charles County, Missouri, at 38.68706, -90.61777.

What rocks and minerals can you find at Chesterfield?+

Chesterfield is reported to produce Garnet, Staurolite.

Is collecting allowed at Chesterfield?+

Permission required before collecting. Requires landowner or agency permission before any collecting. Do not enter without explicit authorization. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Chesterfield?+

A rock hammer, a sieve, and a small shovel work well for garnet-type minerals, which concentrate as resistant grains in soils and creek gravels.

When is the best time to visit Chesterfield?+

The most comfortable months at Chesterfield are February to December.

How do I get to Chesterfield?+

Open the directions link to navigate to 38.68706, -90.61777 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Missouri

See all 94 Missouri spots →

Open Chesterfield on the map

Use the RockHoundR app for live land overlays, weather, geology, directions, and saved finds.