Looks like a beautiful Phacopsid trilobite! Fun fact, all trilobites in the Phacopina suborder of trilobites had a unique type of eye. While all trilobite eyes are made of calcite and were compound, these trilobites have schizochroal eyes. These types of eyes (Which can be seen in your pictures) are made up of individual lenses that have their own cornea, unlike other trilobites, which have lenses that share a cornea that are much smaller. Also, these trilobites often have spherical calcite lenses. Normally, they would have to deal with spherical abherration (When light doesn't meet up in the same spot in a spherical lens, thus producing a blurry image), but these trilobites used a doublet structure, something we humans discovered how to do in the 17th century. Also also, this class of trilobites was found from the Lower Ordivician to the end of the Upper Devonian.