Unnamed Location (Grossular garnet): Grossular Garnet & Vesuvianite Rockhounding in Fresno County, California

Updated June 2026

Unnamed Location (Grossular garnet) is a mapped rockhounding spot in Fresno County, California. Reported finds include grossular garnet, vesuvianite. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Fresno County
State: California
Coordinates: 36.90907, -119.37574

Geology at Unnamed Location (Grossular garnet)

This spot sits on Ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains), mapped as peridotite and serpentinite that formed roughly 1000 to 175 million years ago. Metamorphic rock like this is where garnet, staurolite, and kyanite typically grow as the rock recrystallizes under heat and pressure.

Mapped unit: Ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains)
Age: 1000–175 Ma (Neoproterozoic to Early Jurassic)
Rock types: peridotite and serpentinite
Elevation: 2,170 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 Unnamed Location (Grossular garnet)

Best months: September to June. Typical highs run 94°F in midsummer and 54°F in midwinter, with winter lows near 37°F.

Climate normals: NOAA 1991-2020 monthlies, AUBERRY 2 NW station (15 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.

State guidance last verified: April 1, 2026

BLM California — Recreational mineral collecting
California Geological Survey
CDFW — Suction Dredge Mining Permit Program
Community submissions reviewed against published agency rules

Found at Unnamed Location (Grossular garnet)

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 Unnamed Location (Grossular garnet).

Unnamed Location (Grossular garnet) FAQ

Where is Unnamed Location (Grossular garnet)?+

Unnamed Location (Grossular garnet) is in Fresno County, California, at 36.90907, -119.37574.

What rocks and minerals can you find at Unnamed Location (Grossular garnet)?+

Unnamed Location (Grossular garnet) is reported to produce Grossular Garnet, Vesuvianite.

Is collecting allowed at Unnamed Location (Grossular garnet)?+

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 Unnamed Location (Grossular garnet)?+

A rock hammer, a sieve, and a small shovel work well for garnet-type minerals, which concentrate as resistant grains in soils and creek gravels.

When is the best time to visit Unnamed Location (Grossular garnet)?+

The most comfortable months at Unnamed Location (Grossular garnet) are September to June.

How do I get to Unnamed Location (Grossular garnet)?+

Open the directions link to navigate to 36.90907, -119.37574 in Google Maps. Some spots are remote, so check road conditions before driving out.

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