This is a classic fluorescent specimen from the Franklin Mine, in Franklin, New Jersey- the self-proclaimed "Fluorescent Mineral Capital of the World." This piece contains the two most commonly occurring, and among the most brightly fluorescent minerals from Franklin- calcite and willemite. Viewed under short wave UV (254nm), the calcite shows a bright orange/red response, and the willemite fluoresces bright green. Of historical interest, this piece contains the three primary ore minerals that were sought after by the zinc mines of Franklin- willemite, and non-fluorescent black franklinite and red/brown zincite. The size of this specimen is 11.2 x 7.3 x 6.0 cm, 982 grams.
Under short wave UV (254 nm), calcite fluoresces red and willemite shows a bright green response.
Same view as above, shown under visible light.
Reverse side of same rock, shown under short wave UV.
Reverse side shown under visible light.