While in Sister Bay, Door County, Wisconsin, my daughter found a perfectly preserved specimen. Along the shore of Lake Michigan where it was found, we also discovered many rock masses made of various material. This is due to the glaciers moving as the climate shifted. This area of Lake Michigan used to be tropical, alive with coral and other organisms not found there anymore. This would suggest this would be eons old. Is it worth anything?

About 1 inch wide by .25 in tall