Beginning Friday, May 29th, we will be open for camping only. Although we will continue to be closed to the public for day mining, those registered to camp will be allowed to purchase a mining ticket. If you would like to reserve a campsite, please call our office at (315) 891-3855 between 9AM and 5PM. As a reminder, there is a limit of 6 people per campsite. At this time, only registered guests will be allowed at the campsites (no visitors).  In addition, we have also made the difficult decision to not accept reservations for the Guided Mining (trophy dig) experience for this year's mining season.

Below is a list of COVID-19 guidelines that we have established to help keep everyone safe

1) Anyone entering the mine office must wear a mask.

2) We ask that only one person per group enter the mine office to check-in for camping, purchase mining tickets, rent tools, etc. 

3) Social distancing (6 foot distancing) should be observed at all times.

4) No more than 6 people will be allowed in the mine office at any given time.

The safety of our staff and patrons remains our top priority and we will make a further announcement on our website and Facebook page as soon as we know when we will be able to open to the public for day mining. 

Thank you for your patience, understanding, and continued support. 


Ted, Anita, and Anna Jane Smith

Ace of Diamonds Mine


What are "Herkimer Diamonds"?

HERKIMER DIAMONDS are brilliant, water clear quartz crystals composed of silicon dioxide, hard enough to scratch glass. They are of a hexagonal structure and doubly terminated (points on both ends). Not only are they a prized mineral specimen, but metaphysically, they are also associated with dream work, enhanced creativity, healing, and facilitating meditation.

Where do "Herkimer Diamonds" form?

Dolomite limestone is the rock formation in which they are found. This rock was buried ages ago. Subsequently, surface water containing silicon seeped downward through the earth and was trapped in pockets or cavities in the dolomite rock. Under tremendous heat and pressure these crystals

were formed. Weathering and erosion by glaciers and water have exposed the strata in Middleville, New York. The crystals are found mostly in rock cavities (formed approximately 400 million years ago), but many are found in soil surrounding the weathered rocks.

Why are they called "Herkimer Diamonds"?

The name Herkimer Diamond came about because to the untrained eye, the sparkling crystals look like real diamonds. Since these unique crystals are found in Herkimer County, named after the Revolutionary War General Nicholas Herkimer, the crystals became known as "Herkimer Diamonds." Additionally, the Mohawk Indians, native to this area, are known as ” The People of the Crystals ”


Family owned & operated for over 50 years!

The mine is owned and operated by the Smith Family: Ted, Anita, and Anna Jane Smith.