This is a superbly detailed Elrathia trilobite. It's one of the oldest and most famous of all trilobites and every fossil collection should possess one.
From the Cambrian era - found in Utah, USA - this Trilobite is over 500 million years old
While not a rare fossil - it is a beautiful and highly prized object - and probably the most famous and well known of all trilobites.
It is prized for its finely detailed pleural spines and it's overall proportions.
Most collectors will be familiar with the Trilobite species so I needn't go into any depth, but suffice to say , if you collect fossils and you don't own an Elrathia Kingii then you really should do.
You won't receive this exact specimen, but one very similar that will measure roughly
1cm in length
Professionally boxed and labelled.