Description

#3092 – A 1.26 x 1.26 x 1.22 – inch specimen of  Pyrite from Logrono, Spain.  This specimen is from a truly classic locality for Pyrite.  The pyrite from the Logroño region of Spain (specifically from areas like Navajún in the Cameros Basin) has a unique geological origin involving low-grade hydrothermal metamorphism within sedimentary rock layers.   The formation process occurred during the Late Jurassic to Early Cretaceous periods, approximately 120 million years ago, in the sediments of a large delta that covered the Cameros Sierra.