DAZZLING Hardystonite, Willemite, Calcite & Franklinite Fluorescent Specimen from Franklin, NJ

📏 Size: 4.4 in (11.2 cm)

⚖️ Weight: 1 lb 4.5 oz (581 g)

📍 Locality: Franklin Mine, Franklin, Sussex County, New Jersey, USA

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💎 Description

In daylight, this hefty Franklin specimen presents a pale grayish-white matrix mottled with darker gray-purple patches of hardystonite and scattered dark franklinite grains. The exterior is quiet and unremarkable — nothing prepares the viewer for what happens when the UV lamp comes on.

Under shortwave, the specimen ignites into the full Franklin color palette: bright red-orange calcite floods across the surface, laced and overlaid with vivid electric green willemite in bold branching patterns, while a striking patch of midnight blue-purple hardystonite anchors the composition. Dark franklinite grains stay non-fluorescent throughout, providing textural contrast against the glowing field. Under longwave, the calcite shifts to a softer pink-red and the willemite glows a mellower green, with the hardystonite response much more subdued — a beautiful dual-wavelength piece showcasing the full classic Franklin assemblage in one substantial hand specimen.

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🌍 Composition

• Willemite — Zn₂SiO₄ — vivid electric green under SW UV, softer green under LW UV

• Calcite — CaCO₃ — red-orange under SW UV, pink-red under LW UV

• Hardystonite — Ca₂ZnSi₂O₇ — midnight blue-purple under SW UV, muted under LW UV

• Franklinite — ZnFe₂O₄ — non-fluorescent, dark grains providing contrast

• Natural, untreated specimen from the Franklin Mine, Franklin, NJ

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✨ Features

• Full classic Franklin four-mineral assemblage in one substantial specimen

• Bold hardystonite patch alongside expansive willemite-calcite fluorescent field under SW UV

• Three-color SW response (red-orange, electric green, midnight blue-purple) with franklinite contrast

• Substantial display-grade size at 4.4 in / over 1.25 lb

• Dual-wavelength response — activates under both LW and SW

• Sourced from the historic Franklin Mine, Franklin, Sussex County, NJ — the type locality for hardystonite and franklinite

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🔦 Fluorescence

• LW UV (Lumenbeast 365nm): calcite pink-red; willemite soft green; hardystonite muted; franklinite non-fluorescent

• SW UV (Stimac Engineering 255nm): calcite vivid red-orange; willemite electric green; hardystonite midnight blue-purple; franklinite non-fluorescent

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📸 Photography Notes

Photos taken under natural lighting and UV illumination. No color enhancement or saturation adjustments — appearance shown exactly as observed.

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