fluorescent WILLEMITE with ZINCITE and FRANKLINITE - Sterling Mine, Sussex Co., New Jersey, USA
Green LW SW fluorescent and SW phosphorescent Willemite, microcrystalline orange Zincite, black Franklinite, in white Calcite.
There is a patch of dark blue SW fluorescing Hydrozincite (white surface coating in daylight), it may be hard to see because of the overwhelming Willemite glow.
If you look along the boundary of the Willemite “cap” with a lens you will find some small, flat laying Willemite crystals.
from Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex County, New Jersey, USA - Zincite and Franklinite type locality
Measures approximately 3 x 2.5 x 1 inch, 15.47 oz / 76 x 63 x 25 mm, 438g
Price: 50.00 USD
Item # A0570115
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).