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This complex Conglomerate of large-grained, gemmy Willemite crystals with Franklinite and minor Calcite is highly fluorescent on all sides. An extremely shortwave UV-fluorescent old-mine specimen from the ancient mountains of Northern New Jersey, USA. An active-mine piece from early/mid 20th C. from the Franklin Mine, Franklin, NJ. It contained some of the most spectacular geology on Earth, 300 or so different minerals, about 20% of which fluoresce in short or long wave ultraviolet light. This deposit of zinc-iron-manganese ores shaped by Precambrian carbonates are highly metamorphosed and contain minerals in forms that exist almost nowhere else. These images were taken with a 254 nm UVC light, which has to be used carefully.

Freestanding Gemmy Red Willemite Conglomerate. Franklin Mine, Franklin, NJ

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