JFD58AN9: Exceptional for the locality, in which, although very beautiful crystals of Chalcopyrite replaced by Malachite appear on the Dolomite, they are usually not very large. This piece can be considered one of the largest groups of crystals ever found there, or at least I don't know of any with well developed faces bigger than this one. The credit for finding the piece goes to Paco Pérez, a great field collector in the Basque Country, from whom I got it.
Azcárate Quarry, Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (2004)

Specimen size: 4.2 × 4 × 2.6 cm = 1.65” × 1.57” × 1.02”

Main crystal size: 4.2 × 2.5 cm = 1.65” × 0.98”