The octahedron represents the central intersection of two tetrahedra The inside of the compound of two twin tetrahedra is really an octahedron, and this compound, known as the stella octangula, is its 1st and only stellation. Correspondingly, a regular octahedron is the results of removing from a regular tetrahedron, 4 https://kylerehtsp.uzblog.net/dice-gaming-can-be-fun-for-anyone-36604911