💎Collector’s Grade Willemite & Calcite with Franklinite – UV-Reactive Specimen

This rare fluorescent mineral specimen features a striking combination of willemite, calcite, and franklinite, sourced from the world-famous Franklin Mining District of Sussex County, New Jersey—the “Fluorescent Mineral Capital of the World.” Under UV light, the willemite emits a brilliant neon green glow, while calcite may show subtle orange-pink tones, creating a captivating contrast in the dark. The dark metallic inclusions are franklinite, adding both geological and visual interest to this stunning example of Franklin mineralization. Educational and collector value — an iconic American mineral combination ⸻ 🔬 Scientific Details • Primary Minerals: Willemite (Zn₂SiO₄) and Calcite (CaCO₃) • Accessory Mineral: Franklinite (ZnFe₂O₄) • Locality: Franklin Mine, Sussex County, New Jersey, USA • Formation Environment: Contact-metamorphosed zinc ore deposit in marble host rock • Fluorescence: Bright green-yellow under shortwave UV (willemite) • UV Response Cause: Manganese activators in willemite crystal lattice • Hardness: Willemite 5.5, Calcite 3 on Mohs scale