Elimia tenera, Fossil gastropod-Black Agatized Classroom pack

"These Gastropods From Wyoming are Elimia tenera, in a black agatized matrix. They are from the Eocene Epoch of the Paleocene Period. They are found in the Green River Formation. Classroom packs have 20 Pieces. They are great for a variety of educational fossil activities like creating your own fossil dig. They also make inexpensive classroom gifts and party favors. "