Michigan’s state stone is the Petoskey stone, a fossil colonial coral. Using different sandpaper grits and some “elbow grease,” participants will pick out and polish their own stone to take home while we talk about other local fossils and minerals. All materials provided. Cost is $5/person. Preregistration with payment required by calling 248-858-0916 weekdays or 248-585-0100 during nature center hours or register online.