Top Herkimer Diamond Mines to Visit in New York State

Herkimer Diamonds are a sparkling treasure found only in a few special places one of which is within the rocky layers of upstate New York. These dazzling quartz crystals, renowned for their natural double-terminated points and extraordinary clarity, have captivated rockhounds, geologists, and families alike especially because of their look-alike nature with diamonds.
The good news? You can dig for your own Herkimer Diamonds in several incredible mines across the beautiful state of New York!
In this article, we'll explore the top Herkimer Diamond mines to visit in New York, what makes them unique, the tools and tips you'll need, how you can plan your adventure to uncover these glimmering gems, and even look at other gems and crystals you can find in the Empire State. Whether you're a beginner, a seasoned rockhound, or a family looking for a fun day out, Herkimer mining is a must-try experience. Let's embark on this thrilling adventure!
What Are Herkimer Diamonds?
Herkimer Diamonds aren't actual diamonds-they're a unique variety of quartz crystal found primarily in Herkimer County, New York. What makes them special is their naturally formed points on both ends, called "double terminations." This rare feature makes Herkimer Diamonds look like they were hand-polished by nature!
These crystals formed millions of years ago in pockets of dolomite rock. Thanks to their stunning clarity and sparkle, they're treasured by rock collectors and jewelry makers around the world.
Here's what makes them so special:
- Clarity: Their natural sparkle and transparency resemble true diamonds.
- Formation: The precise geological process gives them their perfect shape.
- Rarity: Their double-terminated feature is rare, making them highly prized by collectors.
Tips for Mining Herkimer Diamonds
Whether you're a beginner or an experienced rockhound, mining for Herkimer Diamonds is an accessible and exciting activity.
1. Essential Tools to Bring
Essential Tools to Bring
- Rock Hammer & Chisel: For breaking apart rocks. See the best types here.
- Safety Goggles: Always protect your eyes. Find recommended goggles here.
- Buckets & Gloves: To gather and handle your finds. See different types of gloves here.
- Spray Bottle: Use water to reveal hidden crystals. Check the best bottles here.
2. Wear the Right Gear
- Clothes: Sturdy clothes you don't mind getting dirty.
- Shoes: Boots with good grip for rocky terrain.
- Accessories: Hats and sunscreen for sunny days.
3. Be Patient
Finding Herkimer Diamonds is rewarding, but it takes some time and effort. Look for shiny spots in cracked rocks or dig deep to uncover crystal pockets.
Top Herkimer Diamond Mines in New York State
Let's explore the best places to mine for Herkimer Diamonds. Each location offers unique opportunities for adventure.
1. Herkimer Diamond Mines
Address: 4601 NY-28, Herkimer, NY 13350
This is the most popular destination for Herkimer Diamond mining, offering a wide range of activities for beginners and seasoned diggers alike.
What to Expect: A sprawling mining area with plenty of crystals to find.
Extras: Guided tours, a museum, and a gift shop filled with Herkimer Diamond jewelry.
Fees: Entry starts at $14 per person.
Pro Tip: Visit early in the day to beat the crowds.
2. Ace of Diamonds Mine & Campground
Address: 84 Herkimer St, Middleville, NY 13406
This mine is known for its friendly staff and a reputation for producing larger Herkimer Diamonds.
What to Expect: A hands-on mining experience with plenty of digging areas.
Extras: On-site camping, making it perfect for overnight trips.
Fees: Entry costs around $10-$15 per person.
Pro Tip: The best finds often require digging a little deeper, so bring sturdy tools!
3. Crystal Grove Diamond Mine & Campground
Address: 161 Co Rd 114, St. Johnsville, NY 13452
This mine offers a quieter, nature-focused experience.
What to Expect: Shaded digging areas, friendly staff, and a peaceful environment.
Extras: Well-maintained camping facilities for an immersive outdoor adventure.
Fees: Day passes start at $10.
Pro Tip: Look for smaller, loose rocks as they often contain hidden gems.
4. Treasure Mountain Diamond Mine
Address: Little Falls, NY
This lesser-known mine is a hidden gem for those looking to escape the crowds.
What to Expect: Smaller crowds and a chance to explore unique geological formations.
Extras: Guided tours available upon request.
Fees: Affordable entry fees around $10.
Pro Tip: Ask staff about the mine's history; it's fascinating!
5. Adirondack Mining Company
Address: Lake George, NY
This mine offers a blend of Herkimer Diamonds and other fascinating minerals.
What to Expect: Family-friendly activities and a variety of gem finds.
Extras: A gift shop with polished stones and jewelry.
Fees: Vary depending on activities chosen.
Pro Tip: Perfect for families with younger kids.
Other Gems and Crystals in New York State
- Garnets: The state gem, found in the Adirondacks.
- Tourmaline: Occasionally discovered in pockets.
- Sphalerite: A striking crystal often found near mining areas.
- Fossils: Trilobites and brachiopods are common in sedimentary rock formations.
Use our rockhounding map to find dig sites and mining grounds for other gems, rocks, and crystals across New York State.
Please always bring appropriate attire and do research before venturing out to rock hunt and crystal hunt. Also, be sure to verify that the location you want to hunt at is available for public access. Rockhounding.org does our best to verify, but it is your responsibility to verify as well because sometimes things change. We are not liable for any actions you take from the information you find on this site.
FAQs About Herkimer Diamond Mining
- Do I need a permit to mine for Herkimer Diamonds? No permit is needed at the commercial mines; entry fees cover access and digging rights.
- What should I bring for Herkimer Diamond mining? Bring a hammer, chisel, safety gear, gloves, and plenty of water. Some mines rent tools if you don't have your own.
- How do I clean Herkimer Diamonds after finding them? Use a toothbrush and soapy water to gently clean dirt and debris off the crystals.
- Are Herkimer Diamonds valuable? Yes! Their value depends on size, clarity, and overall quality, making them sought after for jewelry.
- Can I find other crystals while mining for Herkimer Diamonds? Yes, you might stumble upon calcite, dolomite, and other minerals.
Conclusion
Mining for Herkimer Diamonds in New York is an adventure filled with excitement, discovery, and memories. From beginner-friendly digs to serious rockhounding spots, there's something for everyone.
Don't miss the chance to explore these sparkling treasures and learn more about geology and rockhounding! Visit rockhounding.org to plan your trip, get expert tips, and discover the world of rocks and gems.
Your next adventure awaits-grab your tools and get digging!