A stunning example of geometric perfection in nature, this sharply defined cluster of pyrite cubes hails from the world-famous locality of Navajún, La Rioja, Spain. Measuring 4.7 cm x 4.9 cm x 4.8 cm, this sculptural specimen features three impeccably formed intergrown cubes perched in a seemingly gravity-defying arrangement. The cubes exhibit razor-sharp edges and lustrous mirror-like faces, catching the sunlight in a brilliant metallic display.

Navajún is renowned globally for producing the finest cubic pyrite crystals on Earth—formed in marlstone deposits dating back to the Cretaceous period. The pyrite here crystallized under highly stable conditions, allowing for its unusually perfect morphology and incredibly smooth crystal faces.

This particular specimen has one expertly executed repair at a contact point, which is quite common for material from this deposit due to the natural fragility of the intergrowths during extraction. It remains a museum-worthy piece, exhibiting both architectural complexity and surreal natural symmetry—an exceptional example of mineralogical elegance from this iconic Spanish locale.