Crystal Prospect

WILLEMITE, CALCITE and HARDYSTONITE - Franklin, New Jersey, USA

Light green Willemite fluorescent green SW LW, red Zincite, white Calcite, black Franklinite (some with colorful iridescence), dark blue SW LW fluorescing Hardystonite, and an unidentified pink manganese silicate mineral (possibly Leucophoenicite).

Calcite fluoresces red SW, with momentary phosphorescence - move lamp away quickly to observe.

from Franklin Mine, Franklin, Franklin Mining District, Sussex County, New Jersey, USA - type locality of Franklinite, Zincite, and Hardystonite

the mine is closed since 1954

Measures approximately 3 x 2 x 2 inch, 11.28 oz / 76  x 51 x 51 mm, 320g

Item # A0390614

SOLD

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).