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Genthelvite


Genthelvite : Zn4Be3[S|(SiO4)3]

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Locality: Passaic Pit (Marshall Mine; Passaic Mine), Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA
A fluorescent photograph of two genthelvite crystals (larger is 1 cm by 2 cm, smaller is 0.5 cm by 0.5 cm) in matrix. Exposed under long wave UV using haze filter. Color of light gray-green is accurate. Specimen collected by, and in the collection of, Mark Boyer (circa September 2002) in the Passaic Pit (footwall outcrop of East vein, Sterling ore body). Compliments of the Franklin Mineral Museum.

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