This is a MASSIVE trilobite fossil...it would look great on display!
Trilobites are now extinct but were hard-shelled creatures which lived in the sea about 500 million years ago, even before dinosaurs evolved.
This one is approximately 130mm x 75mm x 20mm (the block is approx. 150mm x 120mm x 80mm)
Please remember though...each fossil is unique and VERY, VERY old …. AND HEAVY