We noticed that you're using an unsupported browser. The TripAdvisor website may not display properly.We support the following browsers:
Windows: Internet Explorer, Mozilla Firefox, Google Chrome. Mac: Safari.

Ace Of Diamonds Mine

84 Herkimer St, Herkimer, NY 13406-2713
+1 315-891-3855
Review Highlights
great time

the gentleman at our Inn told us that this would be the better of the two mines to go to because... read more

Reviewed 2 days ago
We loved it!!! A Newbie To do list & review inside...

OK, so you want some Herkimer diamonds but don’t know what to do? The following is my review which... read more

Reviewed 3 weeks ago
Read all 107 reviews
Map updates are paused. Zoom in to see updated info.
Reset zoom
Updating Map...
  • Excellent55%
  • Very good31%
  • Average7%
  • Poor1%
  • Terrible6%
Travellers talk about
“rock pile” (2 reviews)
“long sleeves” (2 reviews)
84 Herkimer St, Herkimer, NY 13406-2713
+1 315-891-3855
Write a Review
Turn Your Opinions into Points!
Turn your opinions into JPMiles
Turn your opinions into PAYBACK Points
*You can enroll in only one programme at a time to earn rewards for reviews.
JPMiles / Payback Arrow
Reviews (107)
Traveller rating
Traveller type
Time of year

1 - 10 of 107 reviews

Reviewed 2 days ago

the gentleman at our Inn told us that this would be the better of the two mines to go to because you are almost guaranteed to fine Herkimer diamonds. We did. The man who owns the mines was very friendly and knowledgeable. Great stop on...More

Thank LISA K
Reviewed 3 weeks ago

OK, so you want some Herkimer diamonds but don’t know what to do? The following is my review which should help you prepare and succeed: It’s cheap fun! $10/person and tool rental is relatively inexpensive (your driver’s license is used for collateral). They bring in...More

1  Thank Willof72
Reviewed 18 May 2017

We stopped by Ace of Diamonds to check the place out to bring our grandkids once school is over. Then we checked the competitors down the road and we decided that Ace of Diamonds would be much better for kids since it has a huge...More

1  Thank cguillau
Reviewed 6 April 2017

We went last summer, so it was pretty hot. We brought a hammer and set of chisels with us, but they were nowhere strong enough to break the rocks. We rented a sledge hammer and a bigger chisel (reasonably priced in the store). I could...More

2  Thank saratogario
Reviewed 20 February 2017

We have been visiting the Ace for many years. We are always pleased when we are out in the fresh air finding crystals. They have an extensive area to explore and search for Herkimer Diamonds. The atmosphere is low key and rustic. Fun times in...More

2  Thank CatskillMountains1
Reviewed 22 October 2016

I truly witnessed the generosity of New Yorkers this past week at the mine. It was my first time at ace of diamonds, and an angel of a woman showed up early afternoon, and showed us all the best places to look for crystals. She...More

2  Thank Greeneyedsusie
Reviewed 17 October 2016

We got here around 10:30am and continued til almost closing time. There are plenty of places to smash rocks and people with extra time can actually mine solid walls of limestone. There were a few kids here when we went and most of them seemed...More

1  Thank Pat G
Reviewed 17 October 2016

My husband and I dug, cracked and moved piles and came away with 2 5 gallon buckets of diamonds in matrix and at least 23 perfect and semi perfect loose diamonds! This trip was our best. On day two, we scavenged new piles behind the...More

1  Thank Karen V
Reviewed 16 October 2016

We went here to find Herkimer diamonds and we did. People were nice in office/gift shop. Camping areas, picnic tables are available and bathroom with showers. This is suppose to be the best place to go hunting for your diamonds! We did come home with...More

1  Thank Lou Ann N
Reviewed 10 October 2016 via mobile

Took my 12 and 9 yo on a long weekend adventure to mine for Herkimer diamonds and fossils. We started at Ace of Diamonds. Staff is helpful giving you a lay of the land. Tools are available to rent for a buck a piece. Screen...More

5  Thank Katylua
Nearby Restaurants
Main Street Ristorante
9 reviews
6.76 km away
Crazy Otto's Empire Diner
209 reviews
11.90 km away
Blue Rose Restaurant
5 reviews
9.10 km away
Heidelberg Baking Company
54 reviews
9.48 km away
Nearby Attractions
Fort Herkimer Church
5 reviews
13.05 km away
The Little Falls Antique Center
10 reviews
13.74 km away
Remington Arms Museum
5 reviews
14.11 km away
Herkimer Diamond Mines
214 reviews
.43 km away
Questions & AnswersAsk a question
Joe C
What are your hours, and is the mine open year round.
16 November 2016|
Response from Lou Ann N | Reviewed this property |
They are closed for this season but open April 1,2017 and hours are 9-5 according to their website. They operate April 1 to October 31. Google it for more information.
Do they allow dogs on premises?
21 June 2015|
Response from Elisha-John H |
Can I buy a bag of double terminated Herkimer diamonds? I can't make it to your site, but really want to get 20 or so of these little double terminated beauties. Sherri
21 February 2015|
Answer Show all 2 answers
Response from TanteJaye | Reviewed this property |
On their website, they have crystals for sale. Good luck.