The cinnabar cited by Theophrastus Curiosity · Almadenejos, Valle de Alcudia, Ciudad Real Image of Almadenejos, not of the place itself. Cinnabar extraction in these sierras is documented from the 4th century BC, when the Greek philosopher Theophrastus referred to the vermilion mineral coming from Hispania. Photo: 19Tarrestnom65 (CC BY-SA 4.0) What to see and do in Almadenejos