fluorescent HARDYSTONITE with CALCITE, WILLEMITE - Franklin Mine, Sussex Co., New Jersey, USA
Green SW fluorescing Willemite, dark blue SW fluorescent Hardystonite, red SW / dark pink LW fluorescing Calcite, and nonfluorescent black Franklinite.
Hardystonite is found at only a handful of localities worldwide, only two of which are "natural" (of non-anthropogenic origin).
from Franklin Mine, Franklin, Franklin Mining District, Sussex County, New Jersey, USA - Hardystonite and Franklinite type locality
the mine is closed since 1954
Measures approximately 2 x 2 x 1 inch, 3.59 oz / 51 x 51 x 25 mm, 102g
Price: 28.00 USD
Item # A0010517
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).