Westfield: Chiastolite Rockhounding in Middlesex County, Massachusetts

Updated June 2026

Westfield is a mapped rockhounding spot in Middlesex County, Massachusetts. Reported finds include chiastolite. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Middlesex County
State: Massachusetts
Nearest road: North Main Street
Postcode: 01886
Coordinates: 42.59818, -71.46976

Geology at Westfield

This spot sits on Chelmsford Granite, mapped as granite that formed roughly 395 to 370 million years ago. Plutonic rock like this weathers slowly into grus and boulders, and the most productive collecting is typically in weathered zones and drainages.

Mapped unit: Chelmsford Granite
Age: 395–370 Ma (Middle Devonian to Late Devonian)
Rock types: granite
Elevation: 300 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 Westfield

Best months: March to November. Typical highs run 84°F in midsummer and 33°F in midwinter, with winter lows near 15°F.

Climate normals: NOAA 1991-2020 monthlies, LOWELL station (6 mi away), adjusted for elevation.

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 Westfield

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

Chiastolite

Nearby rockhounding spots

Other rockhounding spots within driving distance of Westfield.

Across the state line from Westfield

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

Westfield FAQ

Where is Westfield?+

Westfield is in Middlesex County, Massachusetts, at 42.59818, -71.46976. Nearest road: North Main Street.

What rocks and minerals can you find at Westfield?+

Westfield is reported to produce Chiastolite.

Is collecting allowed at Westfield?+

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 Westfield?+

A rock hammer, sturdy gloves, safety glasses, and a collecting bag cover the basics here. Add a spray bottle: wet rock shows color and pattern that dry rock hides.

When is the best time to visit Westfield?+

The most comfortable months at Westfield are March to November.

How do I get to Westfield?+

Open the directions link to navigate to 42.59818, -71.46976 in Google Maps. The nearest road is North Main Street.

More rockhounding in Massachusetts

See all 45 Massachusetts spots →

Open Westfield on the map

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