Collection: Herkimer Diamond Mine

The Herkimer Diamond Mine, located in Middleville, NY, is world-renowned for its exceptional specimens of doubly-terminated quartz crystals known as Herkimer Diamonds. Situated directly adjacent to the Ace of Diamonds Mine, this locality consistently yields stunning examples of its namesake variety. From impressive multi-crystal clusters to individual gemmy floaters, specimens from this site are featured in museums and private collections worldwide. The majority of crystals we offer from this locality are mined directly by our team, with select pieces offered in collaboration with fellow miners.