Case Quarries: Beryl & Aquamarine Rockhounding in Lower Connecticut River Valley Planning Region, Connecticut

Plan your visit

Generally open to casual rockhounding

County

Lower Connecticut River Valley Planning Region

State

Connecticut

Postcode

06480

Coordinates

41.63500, -72.61500

Coordinates are approximate. Confirm the exact ground in the RockHoundR app, where land overlays show which agency manages the area.

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.

Access note: Collecting is legal only under a Connecticut DEEP Educational Mineral Collection Permit, issued to mineral clubs, schools, nature centers, and museums, not to individuals collecting on their own. The permit is free but must be arranged in advance, with applications opening January 1 each year. On permitted days it is hand tools only, no commercial sale, hard hat and eye protection required. The practical route in is a field trip with a permitted Connecticut mineral club.

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 Case Quarries

Comfortable months (45 to 90°F highs)

Best months: March to November. Typical highs run 84°F in midsummer and 36°F in midwinter, with winter lows near 20°F.

Climate normals: NOAA 1991-2020 monthlies, HARTFORD BRAINARD FLD station (7 mi away), adjusted for elevation.

Geology at Case Quarries

This spot sits on Portland Arkose, mapped as arkose and siltstone that formed roughly 200 to 175 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

Portland Arkose

Age

200–175 Ma (Early Jurassic)

Rock types

arkose and siltstone

Elevation

200 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.

• Connecticut Geological Survey
• CT DEEP state land rules
• Community submissions reviewed against published agency rules