Location: Mina Miguel Vacas, Vila Viçosa, Évora, Portugal.
Aggregate of small prismatic sub-millimetric crystals of translucent emerald green Reichenbachite covering small crystals of Quartz. Sample with 2.3 x 1.6 x 1.6cm. Generated in a supergenic enrichment zone of a copper deposit, especially in brecciated quartz veins with other copper phosphates and carbonates (pseudomalachite, malachite, azurite, etc.).