Minerals and mixtures thereof for medical purposes, mineral preparations to promote wound healing and tissue regeneration of the skin and mucous membranes, including intestinal mucosa, in particular pastes, ointments, creams, granulated, powders, capsules or tablets, and solutions, in particular, aequous solutions of minerals for treatment of wounds of the skin and mucous membranes; medical plasters and dressings both containing minerals to promote wound healing