Diamond Hill Mine: Quartz & Amethyst Rockhounding in Williamsburg County, South Carolina

Quick details

Access

Paid / fee dig

County

Williamsburg County

State

South Carolina

Nearest road

South Williamsburg County Highway

Coordinates

33.61480, -79.93570

Geology at Diamond Hill Mine

This spot sits on Waccamaw Formation, mapped as limestone and sand that formed within roughly the last 3 million years. Loose deposits like these are float-collecting ground: erosion keeps moving durable rocks and minerals into gravel bars, cutbanks, and washes.

Mapped unit

Waccamaw Formation

Age

3 Ma to present (Pleistocene)

Rock types

limestone and sand

Elevation

60 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 Diamond Hill Mine

Best months: September to June. Typical highs run 93°F in midsummer and 59°F in midwinter, with winter lows near 33°F.

Climate normals: NOAA 1991-2020 monthlies, KINGSTREE station (8 mi away).

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.

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 Diamond Hill Mine

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

• QuartzEncyclopedia →
• AmethystEncyclopedia →
• Smoky QuartzEncyclopedia →
• Citrine