Herkimer Diamond Mines, NY

Where: East · North America · approx. 43.04, -74.98 (vicinity only)

Why this spot: Rockhounding locality: Herkimer diamonds (double-terminated quartz)

What turns up: double-terminated clear quartz 'Herkimer diamonds', sometimes with black anthraxolite inclusions or a smoky tint

Access: Permission required.

Fee dig, keep what you find. Admission covers the mine face and basic tools, open seasonally (roughly spring to fall). Hours and prices at herkimerdiamond.com.

Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.