07350 - Beautiful 1.06 Inch Chalcedonized Fossil Gastropod Cretaceous Dakhla Pterosaur Impressive rare pathologically deformed Eremiasaurus

Impressive rare pathologically deformed Eremiasaurus rooted tooth in its natural matrix

Platecarpus ptychodon

very likely of the Dromaeosauridae family

although octahedral and more complex isometric forms are not uncommon

07350 - Beautiful 1.06 Inch Chalcedonized Fossil Gastropod Cretaceous Dakhla Pterosaur Impressive rare pathologically deformed EremiasaurusChaledonized gastropods (specimen at fat left is 3. 0 cm tall) these snail shells have been replaced by translucent, fibrous, microcrystalline quartz (SiO2). This variety of quarz is called chalcedony. Chalcedonization is a variety of silicification. Chalcedonized fossils are uncommon.