Herkimer Diamond Mines
Rockhounding site in Herkimer, New York · Quartz & Crystals
Herkimer Diamond Mines is a quartz rockhounding site near Herkimer, NY. Fee required. Best season: April through October on mine schedules.
Typical season: April through October on mine schedules
Key facts
Structured details for trip planning — verify access and fees with the land manager before you visit.
- Specimen type
- Quartz
- Primary specimens
- Herkimer Diamond, Dolomite, Pyrite
- Fee status
- Fee required
- Nearest town
- Herkimer
- State
- New York
- Coordinates
- 43.01700, -74.96700
- Best season
- April through October on mine schedules
- Access difficulty
- Moderate hammer work on dolomite
- Camping
- Herkimer KOA and area motels
- Activities
- Quartz crystal mining, dolomite splitting
- Facilities
- Multiple commercial mines with tools and restrooms
- Last updated
- July 5, 2026
What to pack for Herkimer Diamond Mines
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The experience
- Best time to visitApril through October on mine schedules
- AccessModerate hammer work on dolomite
- FacilitiesMultiple commercial mines with tools and restrooms
- Camping nearbyHerkimer KOA and area motels
Regional guide
This spot is featured in our Herkimer diamond country roundup with related rockhounding sites in New York.
Explore related hubs
Report an access change
Field conditions change. If this site is closed, claimed, flooded, or the fee has changed, tell us — we update listings with community tips and desk verification.
Include the date you visited and any land-manager contact. Do not share private gate codes.
Map & location
Sources & updates
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