Herkimer Diamond Jewelry

About

Herkimer diamond jewelry features double-terminated quartz crystals — naturally formed with two pointed ends and 18 facets, without cutting or polishing — sourced primarily from Herkimer County, New York. Despite the name, Herkimer diamonds are not technically diamonds. They are an exceptionally clear, naturally faceted variety of quartz that grows in distinctive geometric crystals so brilliant and well-formed they were mistaken for actual diamonds when first discovered in the 18th century. The name has been used in the lapidary trade since. What makes Herkimer diamonds distinctive in fine jewelry isn't just the clarity — it's that every stone arrives in finished form straight from the earth. Most gemstones require cutting and polishing to reveal their visual character. Herkimer diamonds emerge already cut by nature, with sharp double-terminated points and crystal-clear transparency that needs no human modification. The geometry is geological, not manufactured. Aquamarise® has handcrafted Herkimer diamond jewelry since 2016. Every crystal is hand-selected for clarity, geometric symmetry, and inclusion-free brilliance. Wherever possible, we source recycled precious metals from certified refiners. Every order ships with our warranty , 14-day return window on non-customized pieces, and complimentary ring sizing on rings. This collection covers Herkimer diamond jewelry outside of bridal contexts — necklaces, earrings, pendants, fashion rings, and statement pieces. For Herkimer diamond engagement rings specifically (bridal-context rings with engagement-appropriate settings), see our dedicated Herkimer diamond engagement rings collection. For our broader gemstone jewelry across alternative stones, see all gemstone jewelry .