Treasure Mountain Mine: Quartz & Fluorite Rockhounding in Herkimer County, New York

Plan your visit

Pay-to-dig site

County

Herkimer County

State

New York

Nearest road

King Street

Postcode

13350

Coordinates

43.02400, -74.98000

Coordinates are approximate. Confirm the exact ground in the RockHoundR app, where land overlays show which agency manages the area.

Land & collecting status

Pay-to-dig site

This is a fee-dig location. Hours, prices, and what you can keep vary by operator. Call ahead before driving out.

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 Treasure Mountain Mine

Comfortable months (45 to 90°F highs)

Best months: April to November. Typical highs run 83°F in midsummer and 31°F in midwinter, with winter lows near 12°F.

Climate normals: NOAA 1991-2020 monthlies, LITTLE FALLS CITY RSCH station (6 mi away), adjusted for elevation.

Geology at Treasure Mountain Mine

This spot sits on Glacial and Alluvial Deposits, mapped as unconsolidated alluvium that formed within roughly the last 3 million years. Loose deposits like these are float-collecting ground: erosion keeps moving durable rocks and minerals into gravel bars, cutbanks, and washes.

Mapped unit

Glacial and Alluvial Deposits

Age

3 Ma to present (Quaternary)

Rock types

unconsolidated alluvium

Elevation

390 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.

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.

• New York State Museum, Geological Survey
• NYS DEC land use rules
• Herkimer Diamond Mines
• Community submissions reviewed against published agency rules