Fluorite Cubic Crystal with Copper & Chalcopyrite — Bingham, NM

This is a stunning naturally formed cubic fluorite crystal displaying textbook isometric cleavage — the hallmark of true fluorite. The body of the crystal is a soft, smoky lavender-gray with subtle pale green-yellow banding visible in the lower register, hinting at shifting mineral chemistry during formation. What truly sets this specimen apart is the dramatic cleft along the cleavage plane where nature has revealed a hidden world: vivid copper-red metallic flakes, brilliant golden chalcopyrite clusters, and rusty iron oxide staining erupt from the crystal's interior along a natural fracture zone. The transparency of the fluorite lets light pass through, lending the piece an almost glassy, ethereal quality. It's a small but remarkably complex specimen — a little geological story told in one hand-sized cube. Bingham, New Mexico is a renowned collecting locality known for its rich hydrothermal mineralization associated with the region's silver-lead-copper mining history. Fluorite in this area precipitates from hot fluorine-bearing hydrothermal fluids moving through limestone and fractured host rock, often co-depositing alongside sulfide minerals like chalcopyrite, galena, and native copper. The presence of both copper and chalcopyrite inclusions on this specimen is consistent with Bingham's mineralogy and reflects the multi-stage fluid events that created such complex, layered specimens. The pale lavender color in fluorite is typically attributed to trace amounts of yttrium or exposure to natural radiation over geologic time. This specimen is part of Brian Eisenberg's curated traded collection at Iron Mountain Ranch — a piece that traveled far from New Mexico's high desert mining country to find a home in the Tunk Valley highlands of Washington State. It's a collector's gem that pairs scientific beauty with genuine provenance.