This dataset was acquired at the SWING beamline at the French synchrotron SOLEIL. The dataset was obtained by conducting spectral 2D X-ray ptychography on a 7-micron diameter metallic nickel pillar. An energy scan was performed from 8.3 KeV to 8.4 KeV with a 1 eV step, including the resonant energy of nickel at 8.333 KeV. For each energy acquisition, the ptychographic scanning parameters consisted of 242 diffraction patterns from a field of view of 14x12 µm², with an exposure time of 100 ms per point. The ptychographic reconstruction was carried out using the PtychoShelves Matlab software package, involving 200 iterations of the difference map (DM) algorithm, followed by 100 iterations of the maximum likelihood (ML) algorithm.