For that reason, it's the only member of that group to have, amongst its mirror planes, some that do not pass through any of its faces. The octahedron's symmetry group is denoted B3. The octahedron and its twin polytope, the dice, have the identical symmetry group but diverse attribute tetrahedra. https://7diediceset61604.jiliblog.com/79851628/roll-a-d10-things-to-know-before-you-buy