Although seldom seen at the large shows, interesting local calcites tend to turn up at smaller events in the Midwest, often collected by local field collectors.  This is just such a specimen, from somewhere near Manon, Indiana.

Apart from being good calcites, I like to post these as they show the diversity of a largely overlooked group of minerals (Midwestern Calcites-- if they are not from southern Illinois or Elmwood, no one cares).