JFD31AN7: Navajún and its Ampliación a Victoria mine are known worldwide for their cubic pyrites that are among the best in the world, but in addition to the cubes there are also pyrites like this one, with octahedral faces. They appear in the deposit at only a single spot where no work has been done for many years. Maybe one day work will be done in that section again and more of these characteristic cubo-octahedral pyrites will appear, but for now...
I bought it of course from Pedro Ansorena in 2002. Pedro is the owner of the mine and the person who knows it best.
Ampliación a Victoria Mine, De Alcarama Range, Navajún, Comarca Cervera, La Rioja  Spain (±2000)

Specimen size: 3.8 × 3.3 × 3.6 cm = 1.50” × 1.30” × 1.42”