Malachite was a principal copper ore and was mined in south-west Ireland as early as the Bronze Age. Green marks on rock faces in Kerry and West Cork show the presence of copper compounds in the local water (above); much green stone was used in building in Killarney during the 19th century (below).

Small inclusions of Malachite in old red sandstone, built into a wall at Coomakista viewing platform, Ring of Kerry (below).