Opalescent River: Labradorite Rockhounding in Essex County, New York

Updated June 2026

Opalescent River is a mapped rockhounding spot in Essex County, New York. Reported finds include labradorite. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Essex County
State: New York
Nearest road: Opalescent Road
Coordinates: 44.01807, -74.04783

Geology at Opalescent River

This spot sits on Metanorthosite and anorthositic gneiss, mapped as gneiss and metaanorthosite that formed roughly 1600 to 1000 million years ago. Plutonic rock like this weathers slowly into grus and boulders, and the most productive collecting is typically in weathered zones and drainages.

Mapped unit: Metanorthosite and anorthositic gneiss
Age: 1600–1000 Ma (Mesoproterozoic)
Rock types: gneiss and metaanorthosite
Elevation: 1,730 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 Opalescent River

Best months: April to October. Typical highs run 76°F in midsummer and 25°F in midwinter, with winter lows near 3°F.

Climate normals: NOAA 1991-2020 monthlies, NEWCOMB station (9 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 Opalescent River

Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

Labradorite

Nearby rockhounding spots

Other rockhounding spots within driving distance of Opalescent River.

Across the state line from Opalescent River

Opalescent River is close enough to the New York border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Opalescent River FAQ

Where is Opalescent River?+

Opalescent River is in Essex County, New York, at 44.01807, -74.04783. Nearest road: Opalescent Road.

What rocks and minerals can you find at Opalescent River?+

Opalescent River is reported to produce Labradorite.

Is collecting allowed at Opalescent River?+

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 Opalescent River?+

A rock hammer, sturdy gloves, safety glasses, and a collecting bag cover the basics here. Add a spray bottle: wet rock shows color and pattern that dry rock hides.

When is the best time to visit Opalescent River?+

The most comfortable months at Opalescent River are April to October.

How do I get to Opalescent River?+

Open the directions link to navigate to 44.01807, -74.04783 in Google Maps. The nearest road is Opalescent Road.

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Open Opalescent River on the map

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