fluorescent WILLEMITE and HYDROZINCITE with ZINCITE - Sterling Hill, New Jersey, USA
Black Franklinite, red Zincite, with a coating of white Hydrozincite. Under UV illumination green SW LW fluorescent Willemite lights up and Hydrozincite fluoresces SW LW in shades of blue.
from Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex County, New Jersey, USA - Franklinite and Zincite type locality
Measures approximately 4 x 1.5 x 0.75 inch, 13.37 oz / 102 x 38 x 25 mm, 379g
Item # A3791218
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).