Crystal Prospect

fluorescent SPHALERITE in CALCITE - Sterling Hill, New Jersey, USA

Orange and pink LW SW fluorescing Sphalerite with black Franklinite-Magnetite (magnetic, an exsolution of the two minerals), olive-green Diopside, and small amounts of green SW fluorescing Willemite in red SW / pink LW fluorescing Calcite with some odd cream colored LW fluorescence.

Sphalerite is short lived phosphorescent; its subdued orange SW response is difficult to see with the surrounding brighter red fluorescing Calcite.

ex Franklin Mineral Museum - ex Anthony Den Uyl

from Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex County, New Jersey, USA

Measures approximately 3.5 x 3 x 2 inch, 1 lb 5.79 oz / 89 x 76 x 51 mm, 618g

this specimen is featured on mindat, minID: JCN-DEQ

Price: 400.00 USD

Item # A0481214

To show the fluorescent response the specimen was illuminated using 6 watt 254nm (Short Wave) / 366nm (Long Wave) UVGL-58 lamp (you need a proper UV light source to observe the fluorescence, more powerful lamp = brighter response).