Colors edited from <a href="https://en.wikipedia.org/wiki/octahedron" class="extiw" title="en:octahedron">octahedron</a> to show Chiral tetrahedral symmetry.
Robert Webb
Attribution
Created using <a rel="nofollow" class="external text" href="http://www.software3d.com/Stella.php">Stella software</a>