Frederick: Pink Fluorite Rockhounding in Frederick County, Maryland

Quick details

Access

Public area

County

Frederick County

State

Maryland

Nearest road

Hillmark Court

Postcode

21704

Coordinates

39.38929, -77.38826

Geology at Frederick

This spot sits on Rocky Springs Station Member, mapped as sandstone that formed roughly 495 to 485 million years ago. Sedimentary rock like this erodes unevenly, so the most productive collecting is typically along fresh cuts, badland slopes, and active drainages.

Mapped unit

Rocky Springs Station Member

Age

495–485 Ma (Late Cambrian)

Rock types

sandstone

Elevation

280 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 Frederick

Best months: February to December. Typical highs run 89°F in midsummer and 43°F in midwinter, with winter lows near 27°F.

Climate normals: NOAA 1991-2020 monthlies, FREDERICK POLICE BRKS station (3 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 Frederick

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

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