Calymene blumenbachii Trilobite in geode
Ordovician-Silurian, 420 to 480 million years old
The trilobites are remarkable, hard-shelled, segmented creatures that were among the most successful of all early animals, roaming the ancient oceans for over 270 million years 520 million years ago. They went extinct before dinosaurs even came into existence!
6.5 x 4.3 cm (7 x 6 cm block) – 150 g