fluorescent CALCITE, WILLEMITE with FRANKLINITE - Sterling Hill, New Jersey, USA
Black Franklinite, green SW LW fluorescing Willemite, and red SW / magenta LW fluorescing Calcite.
some of the Willemite phosphoresces
from Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex County, New Jersey, USA - Franklinite type locality
Measures approximately 4.5 x 2.75 x 2.5 inch, 2 lbs 6.60 oz / 114 x 70 x 63 mm, 1093g
Item # A1310214
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).