Dimenisons: 85.26 x 10.42mm
 
Opalized belemnite fossils are rare and visually striking remnants of extinct squid-like marine creatures that lived during the Mesozoic era. Found primarily in the opal fields of South Australia, such as Coober Pedy and White Cliffs, these fossils form when the original belemnite material is replaced by precious opal over millions of years. The result is a fossil that retains the shape of the ancient cephalopod while exhibiting vibrant flashes of color characteristic of high-quality opal. These specimens are highly prized by collectors for their rarity, natural beauty, and the fascinating blend of paleontology and gemology they represent.