This is a large, prone, 5.6" Drotops trilobite quarried from Mrakib, Morocco. It's very 3D with outstanding eye facet preservation and excellent preparation. The shell has a white patina to it. This is often seen on specimens from Mrakib where specimens from Issoumour tend to be jet black.
A photo of the Drotops quarry at Issoumour, Morocco showing the hard limestone layers being worked.
A photo of the Drotops quarry at Issoumour, Morocco. The quarry following the horizon where this trilobites are found extends several kilometers around the mountain.
How a Drotops might be found in the field, with part of the tail exposed in the broken rock. It would then be prepared using airscribes and air abrasives a process that would likely take 20+ hours for a good specimen..