Eastern United States Rocks

 Franklin New Jersey

These hand to double hand sized rocks contain:

  • aegirine – non fluorescent olive green
  • andradite – non fluorescent olive green
  • calcite – bright to dull red
  • clinohedrite – orange
  • diopside – bright blue specks
  • esperite – bright yellow
  • hardystonite – blue
  • franklinite – non-fluorescent black
  • norbergite – yellow specks
  • sphalerite – pinkish-orange
  • willemite – bright green
  • wollastonite – yellow spots and streaks

Mineral fluorescence was first noticed in the zinc mines near Franklin, NJ where fluorescence was used to sort ore. It is the most complex, famous and prolific fluorescent mineral location in the world.

Woodbury Tennessee

This hand specimen contains fluorescent:

  • quartz – yellow
  • calcite – blue

Not much quartz fluoresces. When it does, it usually contains trapped hydrocarbons which is probably the case here. The crystalline nature of these Warsaw formation geodes creates a nice sparkle to the fluorescence.

Talcville New York

These palm to hand sized specimens contain fluorescent:

  • tremolite – orange to yellow
  • aphophyllite/manganocummingtonite – red to pink
  • talc – blue

These are classic specimens with attractive textures in natural light. And an unusual combination of pinks, reds and oranges that combine and grade into each other producing a wide array of pastel fluorescent colors.


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