Ammonite - Coilopoceras springeri
Ammonites were marine animals, similar to squid and octopus, that floated about the sea millions of years ago. Their aesthetically pleasing spiraled shells protected the tentacled creatures and came in all different sizes, textures, and probably colors.
Cretaceous (91 million years ago)
Coyame, Baja California, Chihuahua, Mexico