Karelian Diamond Resources Plc engages in the exploration and development of diamond deposits. It holds interests in the Lahtojoki diamond project located in the Kuopio–Kaavi region in Finland; and the Seitaperä diamondiferous kimberlite pipe and the Riihivaara diamond projects situated in the Kuhmo area, Finland. The company also explores for nickel, copper, and platinum metals in Northern Ireland. Karelian Diamond Resources Plc was incorporated in 2004 and is headquartered in Dublin, Ireland.