ESPERITE, WILLEMITE and FRANKLINITE - Franklin Mine, New Jersey, USA
Lemon-yellow SW and pale-yellow LW fluorescing Esperite, with green fluorescent SW and LW Willemite, black Franklinite, and a few spots of dull orange SW fluorescing Clinohedrite.
Esperite is a rare mineral, reported only from 2 localities worldwide
from Franklin Mine, Franklin, Franklin Mining District, Sussex County, New Jersey, USA - Esperite, Franklinite and Clinohedrite type locality
Measures approximately 2 x 1.5 x 1 inch, 3.49 oz / 51 x 38 x 25 mm, 99g
Item # A0490115
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).