Minnieville: Amethyst & Quartz Rockhounding in Prince William County, Virginia

Updated June 2026

Minnieville is a mapped rockhounding spot in Prince William County, Virginia. Reported finds include amethyst, quartz. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Prince William County
State: Virginia
Nearest road: Running Creek Drive
Postcode: 20112
Coordinates: 38.63586, -77.39970

Geology at Minnieville

This spot sits on quaternary alluvium, mapped as gravel 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.

Mapped unit: quaternary alluvium
Age: < 1 Ma (Holocene)
Rock types: gravel
Elevation: 260 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 Minnieville

Best months: February to December. Typical highs run 87°F in midsummer and 42°F in midwinter, with winter lows near 24°F.

Climate normals: NOAA 1991-2020 monthlies, MANASSAS station (8 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 Minnieville

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 Minnieville.

Across the state line from Minnieville

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

Minnieville FAQ

Where is Minnieville?+

Minnieville is in Prince William County, Virginia, at 38.63586, -77.39970. Nearest road: Running Creek Drive.

What rocks and minerals can you find at Minnieville?+

Minnieville is reported to produce Amethyst, Quartz.

Is collecting allowed at Minnieville?+

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 Minnieville?+

A rock hammer, a small pry bar, gloves, and safety glasses cover most crystal ground. A screen helps in loose pocket soil, and newspaper protects points on the way out.

When is the best time to visit Minnieville?+

The most comfortable months at Minnieville are February to December.

How do I get to Minnieville?+

Open the directions link to navigate to 38.63586, -77.39970 in Google Maps. The nearest road is Running Creek Drive.

More rockhounding in Virginia

See all 93 Virginia spots →

Open Minnieville on the map

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