FRANKLINITE, green WILLEMITE and CALCITE - Franklin Mine, Sussex Co., New Jersey, USA
Green Willemite - green fluorescent response in SW and LW UV, with black Franklinite and red SW / subdued pink LW fluorescing Calcite - gets overwhelmed by the strong Willemite response.
Momentary phosphorescence 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 3 x 2 x 1 inch, 13.33 oz / 76 x 51 x 25 mm, 377g
Price: 200.00 USD
Item # A0490414
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).