F10... up for a buy now auction is a Box of 25 mazon creek fossil concretions. The concretions were collected from pit 11 and pit 4 and around Braidwood, Coal City, and Wilmington area. At the strip mines and at some of the shaft mines around that area.  These concretions are waiting to be freeze thawed. Or hammered to open them up. There is no telling what waits inside some of these concretions. These were all collect in Plant and Animal areas. We have found so really good stuff in the past. Spiders fish shrimp worms' tully monsters have all been found in the areas we collect. And some will have nothing some will have something really good. If you buy now, you will all the concretions pictured. "Due to the weight of these we cannot combine shipping.