Hello, here is a "Larger for this Species" Very well preserved and 100% natural Elrathia Kingii Trilobite fossil in its Wheeler Shale Formation matrix! This fossil specimen was quarried in Millard County, Utah on the House Range.

 

This fossil and rock matrix dates from the Middle Cambrian Period, 541 to 485 Million years or....a Crazy Half Billion years ago!

 

The Trilobite fossil measures a nice! 1 1/2" or 4.7cm at its longest from the Cephalon...head to the Pygidium. its tail and the matrix is approximately 4" or from opposing side to side!