Contact Us
If you have any questions about the Herkimer Diamond Mines, the KOA Resort, or the Miners' Table Restaurant and Banquet Facility, feel free to reach out to us via phone or email. We will be happy to respond to your inquiry!
For Herkimer Diamond Mines wholesale operations questions, please reach out to our corporate office Phone: 315-717-0175 (weekdays only) or
Email: diamonds@ntcnet.com
Herkimer Diamond Mines Gift Shop, Sluicing & Prospecting:
Phone: 315-717-0175 (weekdays)
Phone: 315-891-7355 (weekends and evenings)
Email: diamonds@ntcnet.com
KOA Resort - Pricing, Availability & Reservations:
Phone: 315-891-7355
Toll-Free: 800-562-0897
Email: hdmkoa@ntcnet.com
Wholesale Opportunities:
Phone: 315-717-0175 (weekdays only)
Email: diamonds@ntcnet.com
Mining Groups and Educational Programs:
Phone: 315-717-0175 (weekdays only)
Email: diamonds@ntcnet.com
Mailing Address for Herkimer Diamond Mines and KOA Resort:
Herkimer Diamond Mines, Inc.,
800 Mohawk Street
Herkimer, NY 13350