4.10" Fossil Clam With Fluorescent Calcite - Rucks’ Pit, FL

This is a 4.10" wide fossil clam (Mercenaria permagna) from the world-famous Ruck's Pit quarry near Okeechobee, Florida. A significant amount of calcite has completely covered the shell—if not entirely replaced it—and fluoresces under UV light. A small area of deep golden-yellow calcite is also visible on the front.