Fig. 2(c) Grain (c) has been cut through its centre and is photographed through a microscope. Its overall rounded shape suggests long transportation. It is made of several discrete minerals. The platinum alloy is labelled Pt-Fe, and other minerals are labelled as follows: 1: laurite (RuS₂); 2: an unnamed mineral (Pd₁₁Te₂As₂); 3: palladoarsenide (Pd₂As); 4: sperrylite (PtAs₂); 5: irarsite (IrAsS)