Dims: 3.1 x 1.9 x 1.4" (7.9 x 4.8 x 3.6 cm)
Wt: 9.80 oz. (277.8 g)
Sussex County, New Jersey, U.S.A.
This small hand specimen consists of countless tiny crystals and partial crystals of Franklinite that are pressed together with large amounts of granular willemite and some calcite. These minerals have been pressed together into an almost sedimentary deposit- there are definite layers, each of which contain high concentrations of one or another of these minerals. Layers with high concentrations of Franklinite are very dark, of course, and those layers that are high in willemite and calcite have a pale-green and milky-white colorations, respectively. Though this specimen does not show exceptional crystals of any of these minerals, it has wonderful colorations when bathed in shortwave ultraviolet light (see the second image). The calcite takes on a bright red-orange coloration, and the willemite glows an exceptional, bright green. Franklinite, being inert as far as fluorescence is concerned, maintains its black coloration.