From: Miguel Vacas Mine, Vila Viçosa, Evora, Portugal.
  
Crust of olive green millimetric prismatic crystals of Libethenite with darker green anhedral Pseudomalachite disseminated over brecciated Quartz. Sample measuring 5.0 x 4.0 x 3.3 cm. Generated in a supergene enrichment zone of a copper deposit, mainly in brecciated quartz veins with other copper phosphates and carbonates (pseudomalachite, malachite, azurite, etc.).