 It is constructed by 5 icosahedra around each edge in a pentagrammic figure.The vertex figure is a great dodecahedron.It has the same edge arrangement as the 600-cell, grand 120-cell and great 120-cell, and shares its vertices with all other Schläfli–Hess 4-polytopes except the great grand stellated 120-cell (another stellation of the 120-cell).