Trancas Geodes, 10 lb lot Aventurine It was among the last

It was among the last of the non-avian dinosaurs to exist prior to the Cretaceous-Paleogene extinction event

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This is a polished specimen featuring blue

Images show slabs wet and dry

Trancas Geodes, 10 lb lot Aventurine It was among the lastTrancas Geodes from Mexico. These geodes have a darker grey and tan exterior with a translucent to light blue interior. They can have a variety of crystal shapes inside, including fine druzy, large crystals, needle like crystals, or they can be almost solidly filled with chalcedony. Some can fluoresce green under short wave UV light due to trace uranium content. Size can range from a few inches to fist size. Approximately 15 pieces per 10 lb bag.