Hidden Gem Mine: Herkimer Diamond Rockhounding in Herkimer County, New York

Updated August 2026

Hidden Gem Mine is a mapped rockhounding spot in Herkimer County, New York. Reported finds include herkimer diamond. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Paid / fee dig
County: Herkimer County
State: New York
Nearest road: North Ann Street
Postcode: 13365
Coordinates: 43.04340, -74.85960

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 Hidden Gem Mine

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

Herkimer Diamond Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Hidden Gem Mine.

Hidden Gem Mine FAQ

Where is Hidden Gem Mine?+

Hidden Gem Mine is in Herkimer County, New York, at 43.04340, -74.85960. Nearest road: North Ann Street.

What rocks and minerals can you find at Hidden Gem Mine?+

Hidden Gem Mine is reported to produce Herkimer Diamond.

Is collecting allowed at Hidden Gem Mine?+

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. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Hidden Gem Mine?+

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.

How do I get to Hidden Gem Mine?+

Open the directions link to navigate to 43.04340, -74.85960 in Google Maps. The nearest road is North Ann Street.

More rockhounding in New York

See all 92 New York spots →

Open Hidden Gem Mine on the map

Use the RockHoundR app for live land overlays, weather, geology, directions, and saved finds.