Numerous iron-containing minerals exist on Earth (Table 1 & Figure 2). These minerals are classified as Fe(III)-oxides (e.g., hematite), Fe(III)-oxyhydroxides and -hydroxides (e.g., goethite), Fe ...

More information: Jade J. Basinski et al, Quantitative Benchmarking of Catalytic Parameters for Enzyme-Mimetic Ribonucleotide ...

Anything else would have to come from their new environment. Iron oxide minerals are found in rocks around the globe. Some are magnetic, and some of them rust—especially when exposed to water ...