Fluorescent Clam Fossil from Ruck's Pit, Fort Drum, Florida

This is a fluorescent, Pleistocene age (approx. 1-2 mya) Mercenaria permagna clam fossil from the famous Rucks' Pit site in Fort Drum, Florida. During the fossilization process of these clams, the calcium carbonate from the original shell material dissolved and recrystalized as beautiful, honey-colored, scalenohedral, calcite crystals on the interior of the shell. The resulting calcite is brightly fluorescent under all wavelengths of UV, and also displays a short-lived green phosphorescence. The exterior of the shell is encrusted with the coquina from which it was removed. The size of this specimen is 94.2 x 79.5 x 47.9 mm, and it weighs 164 grams.

Mouse over scrolling images for wavelength information.

Email comments or suggestions:

Home

Nature’s Rainbows is a non-commercial web site maintained entirely by volunteer hobbyists and contributors.  Our mission is to provide information about UV and luminescence, premium fluorescent mineral photos, and a fluorescent mineral database for the enjoyment of FL mineral collectors around the world.  Information on this web site is covered under a Creative Commons License.


Feel free to contact us with comments and suggestions.

Like us on Facebook!

  • reddit
  • Facebook Social Icon

Subscribe to our RSS (Real Simple Syndication) feed to get new posts delivered directly to your desktop!