Newark: Calcite & Chalcopyrite Rockhounding in Knox County, Missouri

Updated June 2026

Newark is a mapped rockhounding spot in Knox County, Missouri. Reported finds include calcite, chalcopyrite, goethite, malachite, pyrite, and more. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Knox County
State: Missouri
Nearest road: MO E
Postcode: 63458
Coordinates: 39.97589, -91.97855

Geology at Newark

This spot sits on ground mapped as limestone and siltstone that formed roughly 360 to 325 million years ago. Carbonate rock like this dissolves and weathers readily, so fresh road cuts, quarries, and creek exposures are typically the most productive ground.

Age: 360–325 Ma (Mississippian)
Rock types: limestone and siltstone
Elevation: 670 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 Newark

Best months: March to November. Typical highs run 86°F in midsummer and 35°F in midwinter, with winter lows near 18°F.

Climate normals: NOAA 1991-2020 monthlies, STEFFENVILLE 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 Newark

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 Newark.

Across the state line from Newark

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

Newark FAQ

Where is Newark?+

Newark is in Knox County, Missouri, at 39.97589, -91.97855. Nearest road: MO E.

What rocks and minerals can you find at Newark?+

Newark is reported to produce Calcite, Chalcopyrite, Goethite, Malachite, Pyrite, Quartz.

Is collecting allowed at Newark?+

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 Newark?+

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 Newark?+

The most comfortable months at Newark are March to November.

How do I get to Newark?+

Open the directions link to navigate to 39.97589, -91.97855 in Google Maps. The nearest road is MO E.

More rockhounding in Missouri

See all 94 Missouri spots →

Open Newark on the map

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