Mavri Sykia, active during both ancient and modern periods, was a key site for copper extraction.
Located almost 1 kilometre north of the Platies mine. In this mine there was intense mining activity during ancient times. The deposit had a volume of 1.5 million tones with an average content of 1% in copper and 30% in sulphur. Modern ore production started in 1954 and continued until 1976 with intermediary recesses in 1965-1969 and in 1972-1975. A total of 437,000 tones of ore were dug out of the mine.
Mavridia was the first mine in the Kalavasos area where modern mining began in 1937.
Historically, this area also saw intensive mining during ancient times, as proven by the large accumulations of rust found in the region.
Petra Mine, operational from 1953 to 1966, had one of the largest deposits in the region, with 290,000 tons extracted during its operation.