Ron Coleman Mining: Quartz & Amethyst Rockhounding in Garland County, Arkansas

Plan your visit

Pay-to-dig site

County

Garland County

State

Arkansas

Nearest road

Crystal Ridge Lane

Postcode

71949

Coordinates

34.66230, -93.10070

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 Ron Coleman Mining

Comfortable months (45 to 90°F highs)

Conditions here are workable year-round, with typical highs from 49°F in winter to 89°F in summer.

Climate normals: NOAA 1991-2020 monthlies, BLAKELY MTN DAM station (8 mi away), adjusted for elevation.

Geology at Ron Coleman Mining

This spot sits on Mazarn Shale, mapped as shale that formed roughly 485 to 470 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

Mazarn Shale

Age

485–470 Ma (Early Ordovician)

Rock types

shale

Elevation

870 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.

State guidance last verified: April 1, 2026

• Ouachita National Forest, Mineral Collecting
• Crater of Diamonds State Park, Rules and finds
• Arkansas Geological Survey
• Community submissions reviewed against published agency rules