Herkimer Diamond Quartz

Genuine Herkimer diamond quartz from New York’s Mohawk Valley. Herkimer diamonds are not true diamonds: they are double-terminated quartz crystals that grow naturally faceted and water-clear inside cavities in 500-million-year-old dolostone, which is why they sparkle straight out of the rock. Every piece here is a natural, uncut specimen, photographed as the exact crystal you receive, with its New York locality listed (Herkimer, Middleville, Fort Plain and more). Value depends on clarity, sharp terminations, size and features like golden or smoky color, inclusions, or clusters on matrix. New to Herkimers? Read our complete Herkimer diamond guide for how they form, what they’re worth, and where to dig your own.

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