Opalized Belemnite Fossil from Coober Pedy, Australia
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This is a belemnite fossil that was replaced by opal unearthed in Coober Pedy, Australia. Belemnites were ancient cephalopods that, unlike modern-day squids, had an internal skeleton and 10 arms with hooks on the ends instead of tentacles. Opalized belemnites are very rare, and typically only come from Australia. The sandstone soil that the belemnites were encased in became more acidic after the sea covering the soil dried up, causing silica from the surrounding sandstone to escape and fill the crevices left by the deteriorated bodies of the belemnites. As the acidity began to drop over time, the silica hardened, leaving behind the rare opalized form we see today. The opal is multi-fire, meaning it is generally translucent blue with flashes of color from the every part of the rainbow. This is a rare and unique specimen that would be a fantastic addition to any collection of fossils or minerals!
The fossil is approximately 2" x .25", and the matrix is 4" x 3" x 1". You will also receive a display card with the fossil name and the locale where it was found.