24-cell, stereographic projection, large

This is a stereographic projection of the 24-cell, or octaplex, a 4-dimensional regular solid, into 3-space.  The octaplex is  self-dual, having no real equivalent in 3-space. All of the polytope edges have bee projected onto the circumscribing hypersphere, and are therefore circles in this projection, which preserves circles and angles, but not straight lines or edge length. This makes the 3D projection a unique sculpture consisting of 12 large circles (4 circles each in 3 perpendicular planes which intersect to form a large outer and a small inner octahedron) and 4 small ones,which intersect at the vertices of a regular cuboctahedron. The entire structure has 24 vertices and 96 edges (6 arcs in each of the 16 circles).  The colors are a gradient from blue to green.