Hi everyone, I'm from Sicily and I found this some years ago, from some paleogeographic map and by surfing a little I've found that this could be a Miocene or Pliocene oyster. However I'm not sure about its real name, I've found that it probably is a common Ostrea Edulis fossil, but from Wikipedia images it resembles much a Crassostrea Igens. Anyone can say something more? Should I try to clean it? The dimensions are about 10x11 cm #fossil