Location: Miguel Vacas Mine, Vila Viçosa, Évora, Portugal.
Sample with 3.5 x 3.5 x 2.2cm filling a schist fracture with short dark green prismatic submillimetric and bipiramidal Libethenite crystals. Associated with some lighter green Pseudomalachite. Generated in a supergenic enrichment zone of a copper deposit, mainly in brecciated quartz veins with other copper phosphates and carbonates (pseudomalachite, malachite, azurite, etc.).