Herkimer Diamond Hunting Locations

List of Herkimer Diamond Locations here.

Ace of Diamonds Mine and Campground – Middleville NY

The Ace of Diamonds Mine is located on NYS Route
28 within the village limits of Middleville.

Traveling from the WEST, use Exit 30 (Herkimer) NYS Thruway to
NYS Route 28 North. (We are approximately 9 miles
from the Herkimer Exit).

From the EAST use Exit 29A (Little Falls) NYS Thruway to NYS Route 169, at Middleville, turn left onto NYS Route 28, South. (We are
approximately 13 miles from the Little Falls Exit).

Tel: (315) 891-3855


Ace of Diamonds Mine
P.O. Box 505
Middleville, New York,
13406-505 USA

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Treasure Mountain Diamond Mine, Little Falls, NY

Address: 1959 State Route 5S Little Falls, NY 13365
Tel: 315-823-7625

Hickory Hill Diamond Diggings, Fonda, N.Y.

Minerals: Flawless double terminated quartz crystals (Herkimer Diamonds)

Description: These mines are famous for water-clear, Herkimer diamonds (double terminated quartz crystals.) Pockets can contain hundreds of these beautiful crystals often in clusters and occasionally containing water or bubble inclusions. Last year while they were digging a pit for an outhouse they dug up grapefruit sized crystals just in the topsoil! This site offers hard rock collecting for those that have the energy. For the less energetic you can screen through the soil and find crystals that have weathered from the rock.

Bring: Screens, hand tools, prybars, sledge hammers, insect repellent.

Only open three weekends a year (Memorial Day, July Fourth, and Labor Day.)

Diamond Acres Mine, Fonda NY

Minerals: Flawless double terminated quartz crystals (Herkimer Diamonds)

Description: This location is open year round. For a fee you can collect daily.

Crystal Grove Diamond Mine & Campground
Located just outside of St. Johnsville in the foothills of New York’s beautiful Adirondack Mountains

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