Copperstone Resources AB (publ), formerly known as Kopparberg Mineral AB, is a Sweden-based company active within the mining industry. It holds over 30 exploration permits of a total area of approximately 20,000 hectares. The Company has exploration operations located in Sweden in Hakansboda, Tvistbo, Stalldalen, Garpen and Vetlanda, among others. It has three wholly owned subsidiaries, namely Kopparberg Mining Exploration AB, which was engaged in the exploration activities, Argo AB, which carried out service commissions, both internally and externally, and Copperstone Skelleftea AB, the operational exploration company in the Copperstone area. The instances the Company explores, are found primarily in copper, zinc, gold and silver.