D28 Sphere Dice

A 28-sided die, based on a truncated sphere.The size of its symmetry group is 8 (like a rectangular parallelepiped with a square base: you can rotate it 4 times on its z-axis and also flip it upside down).Basically, if you take the analogy of Earth, it is composed of 4 faces at each poles, 4 faces at the equator and 8 faces at each tropic. It is numbered on a very balanced way: in particular numbers on opposite faces sum to 29 and numbers on any group of 4 adjacent faces sum to 58.Check this post for more information.