Old Pearl River: Agate Rockhounding in St. Tammany Parish, Louisiana
Updated July 2026
The Pearl River system on Louisiana's eastern edge reworks Citronelle gravels into agate, carnelian, and petrified wood, giving the southeastern Florida Parishes their own collecting water. Bars along the old river channels in St. Tammany Parish expose fresh pebbles at low stages. It rounds out the state geographically, pairing with the Amite and Tangipahoa to cover the agate-bearing gravels east of the Mississippi. Reported finds include agate. Below: coordinates, access notes, nearby spots, and trip-planning links.
Old Pearl River photos
Public image records connected to this spot or its reported material.
Map showing Old Pearl River in St. Tammany Parish, Louisiana
Quick details
- Access
- Permission required
- County
- St. Tammany Parish
- State
- Louisiana
- Coordinates
- 30.46748, -89.77508
Geology at Old Pearl River
This spot sits on Alluvium, mapped as clay that formed within roughly the last 12,000 years. Gravels like these concentrate whatever survives the river: agate, jasper, and other tough silica typically show up as rounded, waxy stones.
- Mapped unit
- Alluvium
- Age
- < 1 Ma (Holocene)
- Rock types
- clay
- Elevation
- 40 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 Old Pearl River
Best months: September to June. Typical highs run 92°F in midsummer and 62°F in midwinter, with winter lows near 38°F.
Climate normals: NOAA 1991-2020 monthlies, PICAYUNE station (6 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 Old Pearl River
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 Old Pearl River.
- Bogue Chitto RiverSt. Tammany Parish, Louisiana · 8 mi awayAgate
- Tangipahoa ParishTangipahoa Parish, Louisiana · 37 mi awayCarnelian
- Tangipahoa River & StreamsTop pick in LouisianaTangipahoa Parish, Louisiana · 46 mi awayAgate
- Livingston ParishLivingston Parish, Louisiana · 55 mi awayCarnelian
- Amite River ValleyTop pick in LouisianaEast Baton Rouge Parish, Louisiana · 69 mi awayAgate
- Baton RougeLivingston Parish, Louisiana · 72 mi awayAgate
- East & West Feliciana ParishesTop pick in LouisianaEast Feliciana Parish, Louisiana · 79 mi awayAgate
- Lake ChienTerrebonne Parish, Louisiana · 85 mi awayLapearlite
Across the state line from Old Pearl River
Old Pearl River is close enough to the Louisiana border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.
Old Pearl River FAQ
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More rockhounding in Louisiana
See all 17 Louisiana spots →Open Old Pearl River on the map
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