Here is a nice showcase piece with two trilobites of the species Sthenarocalymene celebra from the Cedarville dolomite. Trilobites  from Cedarville Dolobite are characterized by their special sparkling preservation. Due to the late diagenetic remineralization of the matrix, the internal moulds are covered with  fine dolomite crystals. This gives the trilobites their unique shiny and glittering preservation.
The larger Sthenarocalymene is about 33 mm long, the smaller one measures about 13 mm.

Location:

Size Matrix:

about 80 x 73 mm

Age:

Silurian, Wenlockian , Cedarville Dolomite Springfield Fm.