Fluorescent Opal Belemnite Fossil

This opal fossil is UV fluorescent. The original aragonite internal shell dissolved and was replaced by opal in this belemnite fossil. It existed in the Cretaceous Period. Fossil was probably found in Coober Pedy, Australia. Specimen was on display at the la Specola Museo Di Zoologia Ceropastica e Mineralogia (Florence, Italy) (August 2024).

 

Australian Opal Belemnite Fossil

The original aragonite internal shell dissolved and was replaced by opal in this belemnite fossil. It existed in the Cretaceous Period. Fossil was found in Coober Pedy, Australia. Specimen was on display at the Natural History Museum Vienna (Naturhistorisches Museum Wien) (August 2024).

Opal Plesiosaur Vertebra Fossil

In August 2020, I visited The Field Museum of Natural History. It is an amazing place for any one interested in natural history. My main interests were the fossil and mineral collections on display. One specimen that really impressed me was in the Grainger Hall of Gems. It was an opal plesiosaur vertebra fossil from Australia. The Grainger Hall of Gems started off as a Tiffany & Company gem collection exhibited at Chicago's 1893 World's Columbian Exposition. After the exposition was over, it was purchased and made part of the new museum when it opened in 1921.

Over hundreds and thousands of years silica-rich groundwater dissolve fossil remains and leave silica gel. Once the gel hardens it forms opal. Also included in the display are opal fossilized clam and snail fossils.

I have documented other Australian opal fossils at the Natural History Museum in London, England:
https://louisvillefossils.blogspot.com/2020/02/opal-gastropod-fossils.html

and Muséum National D'Histoire Naturelle Minéralogie et Géologie in Paris France
https://louisvillefossils.blogspot.com/2016/08/opal-belemnite-fossils.html

Opal Gastropod Fossils

Pictured are some nice fossils found in New South Wales, Australia (Lightning Ridge?). These snails date to the Cretaceous Period.

Fossils were on display August 2016 in Natural History Museum of London, England.

Opal Belemnite Fossils

The original aragonite internal shell dissolved and was replaced by opal in these belemnite fossils. They existed the Cretaceous Period. Fossils were found in Coober Pedy, Australia. Specimen was on display at the Muséum National D'Histoire Naturelle Minéralogie et Géologie in Paris France (August 2016).

Learn more here:
http://www.mnhn.fr/fr/visitez/lieux/galerie-mineralogie-geologie