Where to Find Herkimer Diamond in the United States
9 mapped herkimer diamond spots across 2 U.S. states. Herkimer Diamond is reported at multiple rockhounding spots across the United States. The map below shows where collectors most often find it on legal public ground.
Learn about herkimer diamond: properties & identification →Map showing where to find herkimer diamond across the United States, with 9 mapped spots
Top states for herkimer diamond
States ranked by number of herkimer diamond spots in our database. States in bold link to a focused herkimer diamond-in-state list.
Every herkimer diamond spot we track
Sorted by state and county. Coordinates open in Google Maps.
| Spot | County | Minerals | Coordinates | Access |
|---|---|---|---|---|
| Crystal Grove Diamond MineCounty Highway 114 | Fulton County |
| 43.0503, -74.6362 | Paid / fee |
| Ace of Diamonds & Herkimer Diamond Mine | Herkimer County |
| 43.1315, -74.9741 | Public |
| Ace of Diamonds MineNew York State Thruway | Herkimer County |
| 43.0110, -74.9720 | Paid / fee |
| General Area (Herkimer County 1)State Highway 28 | Herkimer County |
| 43.1532, -74.9781 | Public |
| General Area (Herkimer County 2)State Highway 29 | Herkimer County |
| 43.1377, -74.9484 | Public |
| General Area (Herkimer County 3) | Herkimer County |
| 43.1112, -74.9947 | Public |
| Diamond Acres MineStone Arabia Road | Montgomery County |
| 42.9621, -74.4752 | Paid / fee |
| SprakersErie Canalway Trail | Montgomery County |
| 42.8942, -74.4838 | Public |
| Morrison CoveSportsmens Access Road | Bedford County | 40.2437, -78.3852 | Public |
Herkimer Diamond rockhounding FAQ
Where is the best place to find herkimer diamond in the U.S.?+
New York, Pennsylvania have the highest concentrations of herkimer diamond in this list. Each state's quality and access varies — open the linked state pages for a detailed view.
How many herkimer diamond rockhounding spots does RockHoundR track?+
9 mapped spots across 2 states. The app keeps these on a map alongside your private finds.
Can I legally collect herkimer diamond on public land?+
Casual hand collecting of common rocks and minerals like herkimer diamond is allowed on most BLM and U.S. Forest Service land, with daily and annual limits set by the local field office. National parks, most state parks, and tribal land are off-limits. Always check with the managing agency before a trip.
How do I identify herkimer diamond in the field?+
Field identification of herkimer diamond comes down to color, hardness, fracture, and luster. The RockHoundR app links to geology details for each spot to help narrow down what you might be picking up.
Hunt herkimer diamond on the map
Open RockHoundR to see these spots on a real map with public land overlays and trip-planning details.
