07348 - Beautiful 1.07 Inch Chalcedonized Fossil Gastropod Cretaceous Dakhla Mammites nodosoides Beautiful Spinosaurus tooth
Yard notes & kiln story
Description
Beautiful Spinosaurus tooth
Pricyclopyginae
† Pecopteris sp
Sister taxa: Acastidae
Mongolia (9)
07348 - Beautiful 1.07 Inch Chalcedonized Fossil Gastropod Cretaceous Dakhla Mammites nodosoides Beautiful Spinosaurus toothChaledonized gastropods (specimen at fat left is 3. 0 cm tall) these snail shells have been replaced by translucent, fibrous, microcrystalline quartz (SiO2).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.