FRANKLINITE with fluorescent WILLEMITE and CALCITE - Franklin Mine, New Jersey, USA
Black Franklinite, light green Willemite and white Calcite.
Willemite fluorescent in green SW and LW, Calcite fluorescent red SW.
the mine is closed since 1954
from Franklin Mine, Franklin, Franklin Mining District, Sussex County, New Jersey, USA - Franklinite type locality
Measures approximately 1.25 x 1 x 1 inch, 1.53 oz / 32 x 25 x 25 mm, 43g
Item # A0161216X
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).