Pictured are several Silurian Waldron Shale fossils. It appears to be the fossilized habitat of a Cornulites proprius attached to the gas...

All these fossils were found in the Waldron Shale of Clark County, Indiana. All contain pyrite or marcasite minerals. These first two pict...

I make no claims as to being a mineral expert but I believe these specimens are fluorite mixed with calcite or some other mineral (dolomi...