Williams Creek: Amethyst & Quartz Rockhounding in Marion County, Indiana

Updated June 2026

Williams Creek is a mapped rockhounding spot in Marion County, Indiana. Reported finds include amethyst, quartz. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Marion County
State: Indiana
Nearest road: Nottingham Court
Postcode: 46240
Coordinates: 39.88842, -86.14330

Geology at Williams Creek

This spot sits on ground mapped as Muscatatuck Group that formed roughly 420 to 360 million years ago. Quartz crystals typically weather out of veins and pockets and end up in nearby soils and creek beds.

Mapped unit: Muscatatuck Group
Age: 420–360 Ma (Devonian)
Elevation: 740 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 Williams Creek

Best months: March to November. Typical highs run 85°F in midsummer and 36°F in midwinter, with winter lows near 20°F.

Climate normals: NOAA 1991-2020 monthlies, CASTLETON 2 S station (5 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 Williams Creek

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 Williams Creek.

Across the state line from Williams Creek

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

Hueston Woods State ParkTop pick in OhioPreble County, Ohio · 77 mi awayFossil, Trilobite, Brachiopod

Williams Creek FAQ

Where is Williams Creek?+

Williams Creek is in Marion County, Indiana, at 39.88842, -86.14330. Nearest road: Nottingham Court.

What rocks and minerals can you find at Williams Creek?+

Williams Creek is reported to produce Amethyst, Quartz.

Is collecting allowed at Williams Creek?+

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 Williams Creek?+

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 Williams Creek?+

The most comfortable months at Williams Creek are March to November.

How do I get to Williams Creek?+

Open the directions link to navigate to 39.88842, -86.14330 in Google Maps. The nearest road is Nottingham Court.

More rockhounding in Indiana

See all 33 Indiana spots →

Open Williams Creek on the map

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