fluorescing SPHALERITE and WILLEMITE - Sterling Hill, Sussex Co., New Jersey, USA
Orange LW fluorescent and short lived phosphorescent Sphalerite with green SW fluorescing Willemite and black Franklinite-Magnetite (magnetic, an exsolution of the two spinel group minerals).
Measures approximately 3 x 2.5 x 1.5 inch, 13.47 oz / 76 x 63 x 38 mm, 382g
Price: 60.00 USD
Item # A0720115
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).