20-sided dice are often in The form of a regular icosahedron, the Platonic good with 20 identical triangular faces. No other isohedral polyhedron with 20 sides, aside from the infinite family members of trapezohedra and dipyramids exist. A German mildew translucent crimson d20 dim Elf Dice is thrilled to carry ceramic dice from Crit Hit Ceramics.