The photograph of an 0.5cm gold fiveling from Miass is a Marks decahedron with γ γ 111 ≈ ≈ 0.85 γ γ 100 , while the sketch of Rose is for γ γ 111 ≈ ≈ 0.7 γ γ 100 . The 75 atom cluster shown above corresponds to the same shape for a small number of atoms. Experimentally, in fcc crystals fivelings with only {111} and {100} facets are common, but many other facets can be present in the Wulff construction leading to more rounded shapes, for instance {113} facets for silicon. It is known that the surface can reconstruct to a different atomic arrangement in the outermost atomic plane, for instance a dimer reconstruction for {100} facets of silicon particles of a hexagonal overlayer on the {100} facets of gold decahedra.