IIymatogyra Arietina or Rams Horn Oyster Fossils are from the late Cretaceous Age, 95 Million years old. The colors are beautiful muted earthen ones of grays, blues and off white. Size ranges from the largest at 1” to the smallest at 1/4” I have packaged 6 to a set of graduated sizes. These can be drilled for a necklace, added to artwork or simply collected and enjoyed for their ancient unique beauty. Limited Quantities.