WILLEMITE, FRANKLINITE and CALCITE - Franklin Mine, Sussex Co., New Jersey, USA
Black Franklinite, red SW/magenta LW fluorescing Calcite, and green SW LW fluorescing Willemite. Brief phosphorescent flash on Calcite – move lamp away quickly to observe.
from Franklin Mine, Franklin, Franklin Mining District, Sussex County, New Jersey, USA - Franklinite type locality
the mine is closed since 1954
Measures approximately 4 x 2 x 1.25 inch, 1 lb 1.59 oz / 102 x 51 x 32 mm, 499g
Price: 50.00 USD
Item # A1321213
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).