From: Miguel Vacas Mine, Vila Viçosa, Évora, Portugal.
  
Malachite and Reichenbachite crust with green submillimetric prismatic crystals, vitreous luster on brecciated Quartz and schist. Sample with 6.5 x 5.7 x 4.5cm. 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.).