Iron ore oxidizes,,Iron-56 (natural abundance:,Heme iron — which is the more readily absorbed type of iron — is found in meat,,Silver: A native element, mineral, alloy, and byproduct,Most native silver is found associated with hydrothermal activity. In these areas it often occurs in abundance,The value of this minor silver within the ore,Copper mining. From ore to copper. - SchoolScience.co.uk,There are many types of copper ore found throughout the world. Picture 4 shows the distribution of these deposits.