A striking cluster of three intergrown pyrite cubes from the world-renowned Navajún deposit in La Rioja, Spain — one of the few localities on Earth where pyrite develops in near-perfect cubic habit. All three crystals are fully natural. The cluster features one original, intact intergrowth between two of the cubes, preserved exactly as it formed in the ground. One connection between the remaining cubes was professionally reattached after separation during extraction — a standard and universally accepted practice for Navajún specimens, restoring the specimen to its natural configuration. All crystals display sharp edges, well-developed striated faces characteristic of Navajún pyrite, and a bright metallic luster ranging from silver-gold to warm olive-green depending on lighting angle. Condition is excellent with no missing corners or surface damage beyond minor natural cleavage lines.